1
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Schwarzmann J, Eskelinen T, Reith S, Ramler J, Karttunen AJ, Poater J, Lichtenberg C. Bismuth as a Z-Type Ligand: an Unsupported Pt-Bi Donor-Acceptor Interaction and its Umpolung by Reaction with H 2. Angew Chem Int Ed Engl 2024; 63:e202410291. [PMID: 38990168 DOI: 10.1002/anie.202410291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 06/30/2024] [Accepted: 07/10/2024] [Indexed: 07/12/2024]
Abstract
Establishing unprecedented types of bonding interactions is one of the fundamental challenges in synthetic chemistry, paving the way to new (electronic) structures, physicochemical properties, and reactivity. In this context, unsupported element-element interactions are particularly noteworthy since they offer pristine scientific information about the newly identified structural motif. Here we report the synthesis, isolation, and full characterization of the heterobimetallic Bi/Pt compound [Pt(PCy3)2(BiMe2)(SbF6)] (1), bearing the first unsupported transition metal→bismuth donor/acceptor interaction as its key structural motif. 1 is surprisingly robust, its electronic spectra are interpreted in a fully relativistic approach, and it reveals an unprecedented reactivity towards H2.
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Affiliation(s)
- Johannes Schwarzmann
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Str. 4, D-35032, Marburg, Germany
| | - Toni Eskelinen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
| | - Sascha Reith
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Str. 4, D-35032, Marburg, Germany
| | - Jacqueline Ramler
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Str. 4, D-35032, Marburg, Germany
| | - Antti J Karttunen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
| | - Jordi Poater
- Departament de Química Inorgànica i Orgànica & IQTCUB, Universitat de Barcelona, Barcelona, Spain; ICREA, Barcelona, Spain
| | - Crispin Lichtenberg
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Str. 4, D-35032, Marburg, Germany
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2
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Qin L, Liu R, Sagan F, Zhang Z, Zhao L, Mitoraj M, Frenking G. The strongest dative bond in main-group compounds. Theoretical study of OAeF - (Ae = Be-Ba). Phys Chem Chem Phys 2024; 26:24294-24313. [PMID: 39283108 DOI: 10.1039/d4cp01909a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2024]
Abstract
Quantum chemical calculations of the anions OAeF- (Ae = Be-Ba) have been carried out using ab initio methods at the CCSD(T)/def2-TZVPP level and density functional theory employing BP86 with various basis sets. The equilibrium structures have linear geometries for Ae = Be and Mg but they are strongly bent for Ae = Sr and Ba while the calcium species has a quasi-linear structure with a very low bending potential. The calculated bond dissociation energies suggest a record-high BDE of De = 144.08 kcal mol-1 for OBeF- at the CCSD(T)/def2-TZVPP level, which is the strongest BDE for a dative bond that has been found so far. The BDE of the heavier homologues have a continuously decreasing order for Ae with Be > Mg (113.01 kcal mol-1) > Ca (84.06 kcal mol-1) > Sr (72.06 kcal mol-1) > Ba (60.00 kcal mol-1). The calculation of the charge distribution reveals a significant charge donation OAe ← F- with a declining sequence for the heavier atoms Ae. The oxygen atom in OAeF- carries always a higher partial charge than the fluorine atom, which contradicts the standard electronegativities of the atoms. The surprising partial charges are explained with the bonding situation of the atoms in the actual electronic structure. The bonding analysis of the OAe-F- bonds using the EDA-NOCV method shows that the bonds have much more electrostatic character than the Ae-F- bonds in the diatomic anions. This finding is supported by the results of the LED partitioning approach. The dative interactions have three major and one minor component. The assignment of a quadruple bond for the heavier species with Ae = Ca, Sr, Ba is not reasonable. The driving force for the bent geometries is the accumulation of electronic charge in the lone-pair region at the Ae atoms, which enhances the electrostatic attraction with the other atoms. An adequate description of the bonding situation is given by the formula O--Ae+ ← F-.
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Affiliation(s)
- Lei Qin
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Ruiqin Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Filip Sagan
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Gronostajowa 2, 30-387 Cracow, Poland.
| | - Zhaoyin Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Lili Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Mariusz Mitoraj
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Gronostajowa 2, 30-387 Cracow, Poland.
| | - Gernot Frenking
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, D-35043 Marburg, Germany.
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3
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Cui LJ, Liu XB, Zhang HY, Yan B, Orozco-Ic M, Pan S, Cui ZH. In nTl 4-nH + ( n = 0∼4): Tetracoordinate Hydrogen in a Planar Fashion? Inorg Chem 2024; 63:13938-13947. [PMID: 38996364 DOI: 10.1021/acs.inorgchem.4c01224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
The recent report of planar tetracoordinate hydrogen (ptH) in In4H+ is very intriguing in planar hypercoordinate chemistry. Our high-level CCSD(T) calculations revealed that the proposed D4h-symmetric ptH In4H+ is a first-order saddle point with an imaginary frequency in the out-of-plane mode of the hydrogen atom. In fact, at the CCSD(T)/aug-cc-pV5Z/aug-cc-pV5Z-PP level, the C4v isomer, with the H atom located 0.70 Å above the In4 plane, is 0.5 kcal/mol more stable than the D4h isomer. However, given the small perturbation from planarity and essentially barrierless C4v ↔ D4h ↔ C4v transition, the vibrationally averaged structure can still be considered as a planar. Extending our exploration to the InnTl4-nH+ (n = 0-3) systems, we found all these ptH structures, except for In2Tl2H+, to be the putative global minimum. The single σ-delocalized interaction between the central hydrogen atom and InnTl4-n ligand rings proves pivotal in establishing planarity and aromaticity and conferring substantial stability upon these rule-breaking ptH species.
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Affiliation(s)
- Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Xin-Bo Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Hui-Yu Zhang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Bing Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Mesías Orozco-Ic
- Donostia International Physics Center (DIPC), Donostia, Euskadi 20018, Spain
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun 130023, China
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4
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Saha R, Skjelstad BB, Pan S. In Silico Design and Characterization of a New Molecular Electride: Li@Calix[3]Pyrrole. Chemistry 2024; 30:e202400448. [PMID: 38622984 DOI: 10.1002/chem.202400448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/10/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
Electrides, in which anionic electrons are localized independently of the atoms in the compound, have shown promise, especially as catalysts and optoelectronic materials. Here, we present a new computationally designed molecular electride, Li@calix[3]pyrrole (Li@C3P). Electron density and electron localization function analyses unequivocally confirm the existence of localized electride electron density, outside the system, independent of any specific atoms. Non-covalent interaction plots further validate the character of the isolated localized electron, suggesting that the system can be accurately represented by Li+@calix[3]pyrrole ⋅ e-, denoting its distinct charge separation. The remarkable non-linear optical properties of Li@C3P, including average polarizability,α ‾ ${\bar{\alpha }}$ =412.4 au, first hyperpolarizability, β=4.46×104 au, and second hyperpolarizability,γ ∥ ${{\gamma }_{\parallel }}$ =18.40×106 au, are unparalleled in the previously reported and similar Li@C4P molecular electride. Furthermore, energy decomposition analysis in combination with natural orbital for chemical valence theory sheds light on the mechanism of electron density transfer from Li to the C3P cage, yielding the charge-separated Li@C3P complex. In addition to the electron transfer, a key factor to its electride nature is the electronic structure of the CnP cage, which has its lowest unoccupied molecular orbital located in the void adjacent to the N-H groups at the back of the bowl-shaped CnP cage.
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Affiliation(s)
- Ranajit Saha
- Department of Chemistry, Cooch Behar Panchanan Barma University, Cooch Behar, West Bengal, 736101, India
| | - Bastian Bjerkem Skjelstad
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
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5
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Shen H, Head-Gordon M. Occupied-Virtual Orbitals for Chemical Valence with Applications to Charge Transfer in Energy Decomposition Analysis. J Phys Chem A 2024; 128:5202-5211. [PMID: 38900728 DOI: 10.1021/acs.jpca.4c02364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
In this article, we introduce the occupied-virtual orbitals for chemical valence (OVOCV). The OVOCVs can replace or complement the closely related idea of the natural orbitals for chemical valence (NOCV). The input is a difference density matrix connecting any initial single determinant to any final determinant, at a given molecular geometry, and a given one-particle basis. This arises in problems such as orbital rearrangement or charge transfer (CT) in energy decomposition analysis (EDA). The OVOCVs block-diagonalize the density difference operator into 2 × 2 blocks, which are spanned by one level that is filled in the initial state (the occupied OVOCV) and one that is empty (the virtual OVOCV). By contrast, the NOCVs fully diagonalize the density difference matrix and therefore are orbitals with mixed occupied-virtual character. Use of the OVOCVs makes it much easier to identify the donor and acceptor orbitals. We also introduce two different types of EDA methods with the OVOCVs and, most importantly, a charge decomposition analysis method that fixes the unreasonably large CT amount obtained directly from NOCV analysis. The square of the CT amount associated with each NOCV pair emerges as the appropriate value from the OVOCV analysis. When connecting the same initial and final states, this value is identical to the CT amount obtained from the independent absolutely localized molecular orbital (ALMO) complementary occupied-virtual orbital pair (COVP) analysis. The total, summed over all pairs, is also exactly the same as the independently suggested excitation number, as proved herein. Several examples are presented to compare NOCVs and OVOCVs: stretched H2+, a strong halogen bond between tetramethylthiourea and iodine, coordination of ethene in Zeise's salt, and binding in the Cp3La···C≡NCy complex.
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Affiliation(s)
- Hengyuan Shen
- Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Martin Head-Gordon
- Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, California 94720, United States
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6
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Dong X, Miao LH, Liu YQ, Cui LJ, Feng W, Cui ZH. MB 16 - (M=Sc, Y, La): Perfect Bowl-Like Boron Clusters. Chemphyschem 2024; 25:e202300816. [PMID: 38563655 DOI: 10.1002/cphc.202300816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 03/30/2024] [Accepted: 04/02/2024] [Indexed: 04/04/2024]
Abstract
The introduction of transition-metal doping has engendered a remarkable array of unprecedented boron motifs characterized by distinctive geometries and bonding, particularly those heretofore unobserved in pure boron clusters. In this study, we present a perfect (no defects) boron framework manifesting an inherently high-symmetry, bowl-like architecture, denoted as MB16 - (M=Sc, Y, La). In MB16 -, the B16 is coordinated to M atoms along the C5v-symmetry axis. The bowl-shaped MB16 - structure is predicted to be the lowest-energy structure with superior stability, owing to its concentric (2 π+10 π) dual π aromaticity. Notably, the C5v-symmetry bowl-like B16 - is profoundly stabilized through the doping of an M atom, facilitated by strong d-pπ interactions between M and boron motifs, in conjunction with additional electrostatic stabilization by an electron transfer from M to the boron motifs. This concerted interplay of covalent and electrostatic interactions between M and bowl-like B16 renders MB16 - a species of exceptional thermodynamic stability, thus making it a viable candidate for gas-phase experimental detection.
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Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Lin-Hong Miao
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Wei Feng
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
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7
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Cui LJ, Li Y, Leyva-Parra L, Tiznado W, Pan S, Cui ZH. Revisiting the Structure and Bonding in Li 5H 6- and the Exploration of Reactivity: Planar Pentacoordinate Hydrogen. J Phys Chem A 2024; 128:4806-4813. [PMID: 38839423 DOI: 10.1021/acs.jpca.4c02684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Recently, Guha and co-workers (Sarmah, K.; Kalita, A.; Purkayastha, S.; Guha, A. K. Pushing The Extreme of Multicentre Bonding: Planar Pentacoordinate Hydride. Angew. Chem. Int. Ed. 2024, e202318741) reported a highly intriguing bonding motif: planar pentacoordinate hydrogen (ppH) in Li5H6-, featuring C2v symmetry in the singlet state with two distinct H-Li (center-ring) bond distances. We herein revisited the potential energy surface of Li5H6- by using a target-oriented genetic algorithm. Our investigation revealed that the lowest-energy structure of Li5H6- exhibits a ppH configuration with very high D5h symmetry and a 1A1' electronic state. We did not find any electronic effect like Jahn-Teller distortion that could be responsible for lowering its symmetry. Moreover, our calculations demonstrated significant differences in the relative energies of other low-lying isomers. An energetically very competitive planar tetracoordinate hydrogen (ptH) isomer is also located, but it corresponds to a very shallow minimum on the potential energy surface depending on the used level of theory. Chemical bonding analyses, including AdNDP and EDA-NOCV, uncover that the optimal Lewis structure for Li5H6- involves H- ions stabilized by the Li5H5 crown. Surprisingly, despite the dominance of electrostatic interactions, the contribution from covalent bonding is also significant between ppH and the Li5H5 moiety, derived from H-(1s) → Li5H5 σ donation. Magnetically induced current density analysis revealed that due to minimal orbital overlap and the highly polar nature of the H-Li covalent interaction, the ppH exhibits local diatropic ring currents around the H centers, which fails to result in a global aromatic ring current. The coordination of Li5H6- with Lewis acids, BH3 and BMe3, instantly converts the ppH configuration to (quasi) ptH. These Lewis acid-bound ptH complexes show high electronic stability and high thermochemical stability against dissociation and, therefore, will be ideal candidates for the experimental realization.
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Affiliation(s)
- Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Yahui Li
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Luis Leyva-Parra
- Centro de Química Teórica & Computacional (CQT&C), Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Avenida República 275, Santiago de Chile 8370146, Chile
| | - William Tiznado
- Centro de Química Teórica & Computacional (CQT&C), Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Avenida República 275, Santiago de Chile 8370146, Chile
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
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8
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Cui LJ, Liu YQ, Wang MH, Yan B, Pan S, Cui ZH, Frenking G. Multiple Bonding in AeN - (Ae=Ca, Sr, Ba). Chemistry 2024; 30:e202400714. [PMID: 38622057 DOI: 10.1002/chem.202400714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/14/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
Quantum chemical calculations using ab initio methods at the MRCI+Q(8,9)/def2-QZVPPD and CCSD(T)/def2-QZVPPD levels as well as using density functional theory are reported for the diatomic molecules AeN- (Ae=Ca, Sr, Ba). The anions CaN- and SrN- have electronic triplet (3Π) ground states with nearly identical bond dissociation energies De ~57 kcal/mol calculated at the MRCI+Q(8,9)/def2-QZVPPD level. In contrast, the heavier homologue BaN- has a singlet (1Σ+) ground state, which is only 1.1 kcal/mol below the triplet (3Σ-) state. The computed bond dissociation energy of (1Σ+) BaN- is 68.4 kcal/mol. The calculations at the CCSD(T)-full/def2-QZVPPD and BP86-D3(BJ)/def2-QZVPPD levels are in reasonable agreement with the MRCI+Q(8,9)/def2-QZVPPD data, except for the singlet (1Σ+) state, which has a large multireference character. The calculated atomic partial charges given by the CM5, Voronoi and Hirshfeld methods suggest small to medium-sized Ae←N- charge donation for most electronic states. In contrast, the NBO method predicts for all species medium to large Ae→N- electronic charge donation, which is due to the neglect of the (n)p AOs of Ae atoms as genuine valence orbitals. Neither the bond orders nor the bond lengths correlate with the bond dissociation energies. The EDA-NOCV calculations show that the heavier alkaline earth atoms Ca, Sr, Ba use their (n)s and (n-1)d orbitals for covalent bonding.
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Affiliation(s)
- Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Meng-Hui Wang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Bing Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China
| | - Gernot Frenking
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
- Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, D-35043, Marburg, Germany
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9
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Liu XB, Tiznado W, Cui LJ, Barroso J, Leyva-Parra L, Miao LH, Zhang HY, Pan S, Merino G, Cui ZH. Exploring the Use of "Honorary Transition Metals" To Push the Boundaries of Planar Hypercoordinate Alkaline-Earth Metals. J Am Chem Soc 2024; 146:16689-16697. [PMID: 38843775 PMCID: PMC11191695 DOI: 10.1021/jacs.4c03977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/24/2024] [Accepted: 05/24/2024] [Indexed: 06/23/2024]
Abstract
The quest for planar hypercoordinate atoms (phA) beyond six has predominantly focused on transition metals, with dodecacoordination being the highest reported thus far. Extending this bonding scenario to main-group elements, which typically lack d orbitals despite their larger atomic radius, has posed significant challenges. Intrigued by the potentiality of covalent bonding formation using the d orbitals of the heavier alkaline-earth metals (Ae = Ca, Sr, Ba), the so-called "honorary transition metals", we aim to push the boundaries of planar hypercoordination. By including rings formed by 12-15 atoms of boron-carbon and Ae centers, we propose a design scheme of 180 candidates with a phA. Further systematic screening, structural examination, and stability assessments identified 10 potential clusters with a planar hypercoordinate alkaline-earth metal (phAe) as the lowest-energy form. These unconventional structures embody planar dodeca-, trideca-, tetradeca-, and pentadecacoordinate atoms. Chemical bonding analyses reveal the important role of Ae d orbitals in facilitating covalent interactions between the central Ae atom and the surrounding boron-carbon rings, thereby establishing a new record for coordination numbers in the two-dimensional realm.
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Affiliation(s)
- Xin-bo Liu
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - William Tiznado
- Centro
de Química Teórica & Computacional (CQT&C),
Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Avenida República 275, 8370146 Santiago de Chile, Chile
| | - Li-Juan Cui
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Jorge Barroso
- Department
of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Luis Leyva-Parra
- Centro
de Química Teórica & Computacional (CQT&C),
Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Avenida República 275, 8370146 Santiago de Chile, Chile
| | - Lin-hong Miao
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Hui-yu Zhang
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Sudip Pan
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Gabriel Merino
- Departamento
de Física Aplicada, Centro de Investigación
y de Estudios Avanzados Unidad Mérida, Km 6 Antigua Carretera a Progreso.
Apdo. Postal 73, Cordemex, 97310 Mérida, México
| | - Zhong-hua Cui
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
- Key
Laboratory of Physics and Technology for Advanced Batteries (Ministry
of Education), Jilin University, Changchun 130023, China
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10
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Liu YQ, Kalita AJ, Zhang HY, Cui LJ, Yan B, Guha AK, Cui ZH, Pan S. BeM(CO)3- (M = Co, Rh, Ir) and BeM(CO)3 (M = Ni, Pd, Pt): Triply bonded terminal beryllium in zero oxidation state. J Chem Phys 2024; 160:184308. [PMID: 38738611 DOI: 10.1063/5.0181343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 04/25/2024] [Indexed: 05/14/2024] Open
Abstract
We perform detailed potential energy surface explorations of BeM(CO)3- (M = Co, Rh, Ir) and BeM(CO)3 (M = Ni, Pd, Pt) using both single-reference and multireference-based methods. The present results at the CASPT2(12,12)/def2-QZVPD//M06-D3/def2-TZVPPD level reveal that the global minimum of BeM(CO)3- (M = Co, Rh, Ir) and BePt(CO)3 is a C3v symmetric structure with an 1A1 electronic state, where Be is located in a terminal position bonded to M along the center axis. For other cases, the C3v symmetric structure is a low-lying local minimum. Although the present complexes are isoelectronic with the recently reported BFe(CO)3- complex having a B-Fe quadruple bond, radial orbital-energy slope (ROS) analysis reveals that the highest occupied molecular orbital (HOMO) in the title complexes is slightly antibonding in nature, which bars a quadruple bonding assignment. Similar weak antibonding nature of HOMO in the previously reported BeM(CO)4 (M = Ru, Os) complexes is also noted in ROS analysis. The bonding analysis through energy decomposition analysis in combination with the natural orbital for chemical valence shows that the bonding between Be and M(CO)3q (q = -1 for M = Co, Rh, Ir and q = 0 for M = Ni, Pd, Pt) can be best described as Be in the ground state (1S) interacting with M(CO)30/- via dative bonds. The Be(spσ) → M(CO)3q σ-donation and the complementary Be(spσ) ← M(CO)3q σ-back donation make the overall σ bond, which is accompanied by two weak Be(pπ) ← M(CO)3q π-bonds. These complexes represent triply bonded terminal beryllium in an unusual zero oxidation state.
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Affiliation(s)
- Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Amlan J Kalita
- Department of Chemistry, University of Science & Technology, Meghalaya, Ri-Bhoi, Meghalaya 793101, India
| | - Hui-Yu Zhang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Bing Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Ankur K Guha
- Advanced Computational Chemistry Centre, Department of Chemistry, Cotton University, Panbazar, Guwahati, Assam 781001, India
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun 130023, China
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
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11
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Mondal H, Chattaraj PK. Unraveling Reactivity Pathways: Dihydrogen Activation and Hydrogenation of Multiple Bonds by Pyramidalized Boron-Based Frustrated Lewis Pairs. ChemistryOpen 2024; 13:e202300179. [PMID: 38117941 PMCID: PMC11004477 DOI: 10.1002/open.202300179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/24/2023] [Indexed: 12/22/2023] Open
Abstract
The activation of H2 by pyramidalized boron-based frustrated Lewis Pairs (FLPs) (B/E-FLP systems where "E" refers to N, P, As, Sb, and Bi) have been explored using density functional theory (DFT) based computational study. The activation pathway for the entire process is accurately characterized through the utilization of the activation strain model (ASM) of reactivity, shedding light on the underlying physical factors governing the process. The study also explores the hydrogenation process of multiple bonds with the help of B/N-FLP. The research findings demonstrate that the liberation of activated dihydrogen occurs in a synchronized, albeit noticeably asynchronous, fashion. The transformation is extensively elucidated using the activation strain model and the energy decomposition analysis. This approach suggests a co-operative double hydrogen-transfer mechanism, where the B-H hydride triggers a nucleophilic attack on the carbon atom of the multiple bonds, succeeded by the migration of the protic N-H.
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Affiliation(s)
- Himangshu Mondal
- Department of ChemistryIndian Institute of TechnologyKharagpur721302India
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12
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Xu J, Pan S, Yao S, Lorent C, Teutloff C, Zhang Z, Fan J, Molino A, Krause KB, Schmidt J, Bittl R, Limberg C, Zhao L, Frenking G, Driess M. Stabilizing Monoatomic Two-Coordinate Bismuth(I) and Bismuth(II) Using a Redox Noninnocent Bis(germylene) Ligand. J Am Chem Soc 2024; 146:6025-6036. [PMID: 38408197 PMCID: PMC10921399 DOI: 10.1021/jacs.3c13016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/28/2024]
Abstract
The formation of isolable monatomic BiI complexes and BiII radical species is challenging due to the pronounced reducing nature of metallic bismuth. Here, we report a convenient strategy to tame BiI and BiII atoms by taking advantage of the redox noninnocent character of a new chelating bis(germylene) ligand. The remarkably stable novel BiI cation complex 4, supported by the new bis(iminophosphonamido-germylene)xanthene ligand [(P)GeII(Xant)GeII(P)] 1, [(P)GeII(Xant)GeII(P) = Ph2P(NtBu)2GeII(Xant)GeII(NtBu)2PPh2, Xant = 9,9-dimethyl-xanthene-4,5-diyl], was synthesized by a two-electron reduction of the cationic BiIIII2 precursor complex 3 with cobaltocene (Cp2Co) in a molar ratio of 1:2. Notably, owing to the redox noninnocent character of the germylene moieties, the positive charge of BiI cation 4 migrates to one of the Ge atoms in the bis(germylene) ligand, giving rise to a germylium(germylene) BiI complex as suggested by DFT calculations and X-ray photoelectron spectroscopy (XPS). Likewise, migration of the positive charge of the BiIIII2 cation of 3 results in a bis(germylium)BiIIII2 complex. The delocalization of the positive charge in the ligand engenders a much higher stability of the BiI cation 4 in comparison to an isoelectronic two-coordinate Pb0 analogue (plumbylone; decomposition below -30 °C). Interestingly, 4[BArF] undergoes a reversible single-electron transfer (SET) reaction (oxidation) to afford the isolable BiII radical complex 5 in 5[BArF]2. According to electron paramagnetic resonance (EPR) spectroscopy, the unpaired electron predominantly resides at the BiII atom. Extending the redox reactivity of 4[OTf] employing AgOTf and MeOTf affords BiIII(OTf)2 complex 7 and BiIIIMe complex 8, respectively, demonstrating the high nucleophilic character of BiI cation 4.
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Affiliation(s)
- Jian Xu
- Metalorganic
and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Sudip Pan
- Institute
of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Shenglai Yao
- Metalorganic
and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Christian Lorent
- Physical
and Biophysical Chemistry, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | | | - Zhaoyin Zhang
- State
Key Laboratory of Materials-Oriented Chemical Engineering, School
of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jun Fan
- Metalorganic
and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Andrew Molino
- Department
of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne 3086 Victoria, Australia
| | | | - Johannes Schmidt
- Functional
Materials, Department of Chemistry, Technische
Universität Berlin, 10623 Berlin, Germany
| | - Robert Bittl
- Fachbereich
Physik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Christian Limberg
- Institut
für Chemie, Humboldt-Universität
zu Berlin, 12489 Berlin, Germany
| | - Lili Zhao
- State
Key Laboratory of Materials-Oriented Chemical Engineering, School
of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Gernot Frenking
- State
Key Laboratory of Materials-Oriented Chemical Engineering, School
of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
- Fachbereich
Chemie, Philipps-Universität Marburg, 35032 Marburg, Germany
| | - Matthias Driess
- Metalorganic
and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
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13
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Weinhold F, Glendening ED. Natural resonance-theoretic conceptions of extreme electronic delocalization in soft materials. Phys Chem Chem Phys 2024; 26:2815-2822. [PMID: 38196333 DOI: 10.1039/d3cp04790c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
In the broad context of Dalton's atomic hypothesis and subsequent classical vs. quantum understanding of macroscopic materials, we show how Pauling's resonance-type conceptions, as quantified in natural resonance theory (NRT) analysis of modern wavefunctions, can be modified to unify description of interatomic interactions from the Lewis-like limit of localized e-pair covalency in molecules to the extreme delocalized limit of supramolecular "soft matter" aggregation. Such "NRT-centric" integration of NRT bond orders for hard- and soft-matter interactions is illustrated with application to a long-predicted and recently synthesized organometallic sandwich-type complex ("diberyllocene") that exhibits bond orders ranging from the soft limit (bBeC ≈ 0.01) to the typical values (bCC ≈ 1.35) of molecular resonance-covalency in the organic domain, with intermediate value (bBeBe ≈ 0.86) for intermetallic Be⋯Be interaction.
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Affiliation(s)
- Frank Weinhold
- Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA.
| | - Eric D Glendening
- Department of Chemistry and Physics, Indiana State University, Terre Haute, IN 47809, USA.
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14
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Bachir N, Kenouche S, Martínez-Araya JI. The effect of {O,N}=X⋯M={Ti,Zr,Hf} interactions on the sensitivity of CNO 2 trigger bonds in FOX-7: Approach based on the QTAIM/EDA-NOCV analysis. J Mol Graph Model 2024; 126:108645. [PMID: 37812869 DOI: 10.1016/j.jmgm.2023.108645] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 10/11/2023]
Abstract
The local chemical reactivity of FOX-7 (1,1-diamino-2,2-nitroethylene, also known as DADNE from DiAminoDiNitroEthylene) was elucidated through a quantitative study of the electrostatic potential on the molecular surface, topological analysis based on Bader's theory, and the EDA-NOCV method. Unlike (O2N)2CC(NH2)H2N⋯Cp2MCH3+ complexes, which exhibit both σ-donor and π-acceptor features, the situation is different concerning the (H2N)2CC(NO2)(O)NO⋯Cp2MCH3+ complexes, where both charge transfers correspond to the σ-donation. The two charge transfers reinforce each other, resulting in increased stability for (H2N)2CC(NO2)(O)NO⋯Cp2MCH3+. This seems to strengthen the (H2N)2CC(NO2)(O)NO⋯M={Ti,Zr,Hf} bond, which may explain the high stability of (H2N)2CC(NO2)(O)NO⋯Cp2MCH3+ compared to (O2N)2CC(NH2)-H2N⋯Cp2MCH3+. Results from topological analysis revealed that the decreased sensitivity to decomposition of CNO2 bonds depends on the chemical nature of the interacting metal, and the best achievements are obtained for the Hf-based complex. Our results demonstrate that the interaction of M={Ti,Zr,Hf} with CNO2 is more favourable than that with CNH2, this specific action on the trigger bond may support the use of Metallocene Methyl Cations (MMC) as possible neutralisers.
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Affiliation(s)
- Nassima Bachir
- Group of Modeling of Chemical Systems using Quantum Calculations, Applied Chemistry Laboratory (LCA). University M. Khider of Biskra, 07000 Biskra, Algeria
| | - Samir Kenouche
- Group of Modeling of Chemical Systems using Quantum Calculations, Applied Chemistry Laboratory (LCA). University M. Khider of Biskra, 07000 Biskra, Algeria
| | - Jorge I Martínez-Araya
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello (UNAB), Av. República 275, 8370146 Santiago, Chile; Centro de Química Teórica y Computacional (CQT&C). Facultad de Ciencias Exactas, Santiago, Chile.
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15
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Shui Y, Liu D, Zhao P, Zhao X, Ehara M, Lu X, Akasaka T, Yang T. Element effects in endohedral metal-metal-bonding fullerenes M2@C82 (M = Sc, Y, La, Lu). J Chem Phys 2023; 159:244302. [PMID: 38131484 DOI: 10.1063/5.0180309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
Endohedral metal-metal-bonding fullerenes have recently emerged, in which encapsulated metals form a metal-metal bond. However, the physical reasons why some metal elements prefer to form metal-metal bonds inside fullerene are still unclear. Herein, we reported first-principles calculations on electronic structures, bonding properties, dynamics, and thermodynamic stabilities of endohedral metallofullerenes M2@C82 (M = Sc, Y, La, Lu). Multiple bonding analysis approaches unambiguously reveal the existence of one two-center two-electron σ covalent metal-metal bond in M2@C82 (M = Sc, Y, Lu); however, the La-La bonding interaction in La2@C82 is weaker and could not be categorized as one metal-metal covalent bond. The energy decomposition analysis on bonding interactions between an encapsulated metal dimer and fullerene cages suggested that there exist two electron-sharing bonds between a metal dimer and fullerene cages. The reasons why La2 prefers to donate electrons to fullerene cages rather than form a standard σ covalent metal-metal bond are mainly attributed to two following facts: La2 has a lower ionization potential, while the hybridization of ns, (n - 1)d, and np atomic orbitals in La2 is higher. Ab initio molecular dynamic simulations reveal that the M-M bond length at room temperature follows the trend of Sc < Lu < Y. The statistical thermodynamics calculations at different temperatures reveal that the experimentally observed endohedral metal-metal-bonding fullerenes M2@C82 have high concentrations in the endohedral fullerene formation temperature range.
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Affiliation(s)
- Yuan Shui
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
| | - Dong Liu
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
| | - Pei Zhao
- Research Center for Computational Science, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
| | - Xiang Zhao
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
| | - Masahiro Ehara
- Research Center for Computational Science, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
| | - Xing Lu
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Takeshi Akasaka
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Tao Yang
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
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16
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Parvathy P, Parameswaran P. Organometallic Allene [(μ-C)(Fe(CO) 4 ) 2 ]: Bridging Carbon Showing Transformation from Classical Electron-Sharing Bonding to Double σ-Donor and Double π-Acceptor Ligation. Chemphyschem 2023; 24:e202300528. [PMID: 37563865 DOI: 10.1002/cphc.202300528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/12/2023]
Abstract
Allenes (R2 C=C=CR2 ) have been traditionally perceived to feature localized orthogonal π-bonds between the carbon centres. We have carried out quantum-mechanical studies of the organometallic allenes envisioned by the isolobal replacement of the terminal CH2 groups by the d8 Fe(CO)4 fragment. Our studies have identified two organometallic allenes viz. D2d symmetric [(μ-C)(Fe(CO)4 )2 ] (2) and D3 symmetric [(μ-C)(Fe(CO)4 )2 ] (3) with trigonal bipyramidal coordination at the Fe atoms. Compound 2 features the bridging carbon atom in an equatorial position with respect to the ligands on the TM centre, while 3 features the central carbon atom in an axial position. The bis-pseudoallylic anionic delocalisation proposed in the C2-C1-C3 spine of organic allene is retained in the organometallic allene 2, and is transformed to a typical three-centre bis-allylic anionic delocalisation in the organometallic allene 3. The topological analysis of electron density also indicates a bis-allylic anionic type delocalisation in the organometallic allenes. The quantitative bonding analysis using the EDA-NOCV method suggests a transition from classical electron-sharing bonding between the central carbon atom and the terminal groups in 1 to donor-acceptor bonding in 3. Meanwhile, both electron-sharing and donor-acceptor bonding models are found to be probable heuristic bonding representations in the organometallic allene 2.
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Affiliation(s)
- Parameswaran Parvathy
- Department of Chemistry, National Institute of Technology Calicut, Kerala, 673601, India
| | - Pattiyil Parameswaran
- Department of Chemistry, National Institute of Technology Calicut, Kerala, 673601, India
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17
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Suthar S, Mondal KC. Open shell versus closed shell bonding interaction in cyclopropane derivatives: EDA-NOCV analyses. J Comput Chem 2023; 44:2184-2211. [PMID: 37530758 DOI: 10.1002/jcc.27190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 08/03/2023]
Abstract
Cyclopropane ring is a very common motif in organic/bio-organic compounds. The chemical bonding of this strained ring is taught to all chemistry students. This three-membered cyclic, C3 ring is quite reactive which has attracted both, synthetic and theoretical chemists to rationalize/correlate its stability and bonding with its reactivity and physical properties over a century. There are a few bonding models (mainly the Bent-Bond model and Walsh model) of this C3 ring that are debated to date. Herein, we have carried out energy decomposition analysis coupled with natural orbital for chemical valence (EDA-NOCV) to study the two most reactive bonds of cyclopropane rings of 49 different organic compounds containing different functional groups to obtain a much deeper bonding insight toward a more general bonding model of this class of compounds. The EDA-NOCV analyses of fragment orbitals and susequent bond formation revealed that the nature of the CC bond of the cyclopropane (splitting two bonds at a time out of three CC bonds) ring is preferred to form two dative covalent CC bonds (between a singlet olefin-fragment and an excited singlet carbene-fragment with a vacant sp2 orbital and a filled p-orbital) for the majority (37/49) of compounds over two covalent electron sharing bonds in some (7/49) compounds (between an excited triplet olefin and triplet carbene), while a few (5/49) compounds show flexibility to adopt either the electron sharing or dative covalent bond as both are equally possible. The effects of functional groups on the nature of chemical bond in cyclopropane rings have been studied in detail. Our bonding analyses are in line with the QTAIM analyses which produce small negative values of the Laplacian, significantly positive values of bond ellipticity, and accumulation of electron densities around the ring critical point of C3 -rings. These corresponding QTAIM parameters of C3 -rings are quite different for CC single bonds of normal hydrocarbons as expected. The chemical bonding in the majority of cyclopropane rings can be very similar to those of metal-olefin systems.
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Affiliation(s)
- Sonam Suthar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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18
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Liu YQ, Yan GR, Cui LJ, Yan B, Pan S, Cui ZH. Mimicking the C 2 molecule: M 2B 2 and M 3B 2+ clusters (M = Li, Na) and the reactivity of the N-heterocyclic carbene bound Li 2B 2 complex. Phys Chem Chem Phys 2023; 25:24853-24861. [PMID: 37672278 DOI: 10.1039/d3cp02509h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
C2 has attracted considerable attention from the scientific community for its debatable bonding situation. Herein, we show that the global minima of M2B2 and M3B2+ (M = Li, Na) possess similar covalent bonding patterns to C2. Because of strong charge transfer from M2/M3 to B2 dimer, they can be better described as [M2]2+[B2]2- and [M3]3+[B2]2- salt complexes with the B22- core surrounded perpendicularly by two and three M+ atoms, respectively. The energy decomposition analyses in combination with the natural orbital for chemical valence theory give four bonding components in C2, M2B2, and M3B2+ clusters. However, the fourth component does not arise from a bonding interaction but from polarization/hybridization. Considering the effect of Pauli repulsion in σ-space, the attractive covalent interaction in these molecules mainly comes from the two π-bonds. We further presented stable N-heterocyclic carbene (NHC) and triphenylphosphine (PPh3) ligands bound Li2B2(NHC)2 and Li2B2(PPh3)2 complexes. A comparative study of reactivity towards L = CO2, CO, and N2 between Li2B2(NHC)2 and B2(NHC)2 is also performed. L-Li2B2(NHC)2 is highly stable against L dissociation at room temperature for L = CO2 and CO, and the stability is markedly higher than that in L-B2(NHC)2. The larger B2→L π-backdonation in L-Li2B2(NHC)2 also makes L more activated than in L-B2(NHC)2.
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Affiliation(s)
- Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
| | - Gai-Ru Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
| | - Li-Juan Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
| | - Bing Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun 130023, China
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19
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Poater J, Vermeeren P, Hamlin TA, Bickelhaupt FM, Solà M. On the existence of collective interactions reinforcing the metal-ligand bond in organometallic compounds. Nat Commun 2023; 14:3872. [PMID: 37400461 DOI: 10.1038/s41467-023-39498-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 06/08/2023] [Indexed: 07/05/2023] Open
Affiliation(s)
- Jordi Poater
- Departament de Química Inorgànica i Orgànica & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Pascal Vermeeren
- Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Trevor A Hamlin
- Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - F Matthias Bickelhaupt
- Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands.
- Institute of Molecules and Materials (IMM), Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands.
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa.
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain.
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20
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Pan S, Frenking G. Comment on "The oxidation state in low-valent beryllium and magnesium compounds" by M. Gimferrer, S. Danés, E. Vos, C. B. Yildiz, I. Corral, A. Jana, P. Salvador and D. M. Andrada, Chem. Sci. 2022, 13, 6583. Chem Sci 2023; 14:379-383. [PMID: 36687352 PMCID: PMC9811506 DOI: 10.1039/d2sc04231b] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/21/2022] [Indexed: 12/23/2022] Open
Abstract
We challenge the assignment of the oxidation state +2 for beryllium and magnesium in the complexes Be(cAACDip)2 and Mg(cAACDip)2 as suggested by Gimferrer et al., Chem. Sci. 2022, 13, 6583 in a recent study. A careful review of the data in the ESI contradicts their own statement and shows that the results support the earlier suggestion that the metals are in the zero oxidation state. The authors reported wrong data for the excitation energies of Be and Mg to the 1D (np2) state. We also correct some misleading statements about the EDA method.
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Affiliation(s)
- Sudip Pan
- Fachbereich Chemie, Philipps-Universität MarburgMarburgGermany
| | - Gernot Frenking
- Fachbereich Chemie, Philipps-Universität MarburgMarburgGermany,Donostia International Physics Center (DIPC)20018 San SebastianSpain,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech UniversityChina
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21
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Yun GR, Li HX, Cabellos JL, Tiznado W, Cui ZH, Pan S. Hitting the Bull's Eye: Stable HeBeOH + Complex. Chemphyschem 2022; 23:e202200587. [PMID: 36029196 DOI: 10.1002/cphc.202200587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/26/2022] [Indexed: 01/05/2023]
Abstract
It is now known that the heavier noble gases (Ng=Ar-Rn) show some varying degrees of reactivity with a gradual increase in reactivity along Ar-Rn. However, because of their very small size and very high ionization potential, helium and neon are the hardest targets to crack. Although few neon complexes are isolated at very low temperatures, helium needs very extreme situations like very high pressure. Here, we find that protonated BeO, BeOH+ can bind helium and neon spontaneously at room temperature. Therefore, extreme conditions like very low temperature and/or high pressure will not be required for their experimental isolation. The Ng-Be bond strength is very high for their heavier homologs and the bond strength shows a gradual increase from He to Rn. Moreover, the Ng-Be attractive energy is almost exclusively originated from the orbital interaction which is composed of one Ng(s/pσ )→BeOH+ σ-donation and two weaker Ng(pπ )→BeOH+ π-donations, except for helium. Helium uses its low-lying vacant 2p orbitals to accept π-electron density from BeOH+ . Previously, such electron-accepting ability of helium was used to explain a somewhat stronger helium bond than neon for neutral complexes. However, the present results indicate that such π-back donations are too weak in nature to decide any energetic trend between helium and neon.
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Affiliation(s)
- Gai-Ru Yun
- Institute of Atomic and Molecular Physics, Jilin University, 130023, Changchun, China
| | - Hai-Xia Li
- Institute of Atomic and Molecular Physics, Jilin University, 130023, Changchun, China
| | - Jose Luis Cabellos
- Universidad Politécnica de Tapachula, Carretera Tapachula a Puerto Madero km 24+300, San Benito, Puerto Madero, C.P. 30830, Tapachula, Chiapas, Mexico
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, postCode/>8370251, Chile
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, 130023, Changchun, China.,Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, 130023, Changchun, China
| | - Sudip Pan
- Institute of Atomic and Molecular Physics, Jilin University, 130023, Changchun, China.,Fachbereich Chemie, Philipps-Universitt Marbur, Hans-Meerwein-Straße, 35043, Marburg, Germany
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22
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Warring LS, Walley JE, Dickie DA, Tiznado W, Pan S, Gilliard RJ. Lewis Superacidic Heavy Pnictaalkene Cations: Comparative Assessment of Carbodicarbene-Stibenium and Carbodicarbene-Bismuthenium Ions. Inorg Chem 2022; 61:18640-18652. [DOI: 10.1021/acs.inorgchem.2c03135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Levi S. Warring
- Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Jacob E. Walley
- Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 270, Santiago 8370146, Chile
| | - Sudip Pan
- Philipps-Universität Marburg Hans-Meerwein-Straße, Marburg 35032, Germany
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Robert J. Gilliard
- Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
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23
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Miller E, Mai BK, Read JA, Bell WC, Derrick JS, Liu P, Toste FD. A Combined DFT, Energy Decomposition, and Data Analysis Approach to Investigate the Relationship Between Noncovalent Interactions and Selectivity in a Flexible DABCOnium/Chiral Anion Catalyst System. ACS Catal 2022; 12:12369-12385. [PMID: 37215160 PMCID: PMC10195112 DOI: 10.1021/acscatal.2c03077] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Developing strategies to study reactivity and selectivity in flexible catalyst systems has become an important topic of research. Herein, we report a combined experimental and computational study aimed at understanding the mechanistic role of an achiral DABCOnium cofactor in a regio- and enantiodivergent bromocyclization reaction. It was found that electron-deficient aryl substituents enable rigidified transition states via an anion-π interaction with the catalyst, which drives the selectivity of the reaction. In contrast, electron-rich aryl groups on the DABCOnium result in significantly more flexible transition states, where interactions between the catalyst and substrate are more important. An analysis of not only the lowest-energy transition state structures but also an ensemble of low-energy transition state conformers via energy decomposition analysis and machine learning was crucial to revealing the dominant noncovalent interactions responsible for observed changes in selectivity in this flexible system.
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Affiliation(s)
- Edward Miller
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jacquelyne A Read
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - William C Bell
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jeffrey S Derrick
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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24
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Dong X, Liu Y, Liu X, Pan S, Cui Z, Merino G. Be
4
B
12
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: A Covalently Bonded Archimedean Beryllo‐Borospherene. Angew Chem Int Ed Engl 2022; 61:e202208152. [DOI: 10.1002/anie.202208152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics Jilin University Changchun 130023 China
| | - Yu‐qian Liu
- Institute of Atomic and Molecular Physics Jilin University Changchun 130023 China
| | - Xin‐bo Liu
- Institute of Atomic and Molecular Physics Jilin University Changchun 130023 China
| | - Sudip Pan
- Fachbereich Chemie, Philipps-Universitt Marburg Hans-Meerwein-Straße 35043 Marburg Germany
| | - Zhong‐hua Cui
- Institute of Atomic and Molecular Physics Jilin University Changchun 130023 China
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) Jilin University Changchun 130023 China
| | - Gabriel Merino
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex 97310 Mérida, Yuc México
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25
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Dong X, Liu YQ, Tiznado W, Cabellos-Quiroz JL, Zhao J, Pan S, Cui ZH. Designing a Four-Ring Tubular Boron Motif through Metal Doping. Inorg Chem 2022; 61:14553-14559. [PMID: 36074140 DOI: 10.1021/acs.inorgchem.2c01179] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tubular boron clusters represent a class of extremely unusual geometries that can be regarded as a key indicator for the 2D-to-3D boron structural evolution as well as the embryos for boron nanotubes. While a good number of pure boron or metal-doped boron tubular clusters have been reported so far, most of them are two-ring tubular structures, and their higher-ring analogues are very scarce. We report herein the first example of a four-ring tubular boron motif in the cagelike global minimum of Be2B24+. Global-minimum searches of MB24q and M2B24q (M = alkali/alkaline-earth metals; q = 1+, 0, 1-) reveal that the most stable structure of Be2B24+ is a C2v-symmetric cage having a four-ring tubular boron moiety, whereas it is a high-lying isomer for those having a two/three-ring tubular boron motif for all other systems. The B24 framework in Be2B24+ can be viewed as consisting of two two-ring B12 tubular structures linked together at one side of the B6 rings along the high-symmetry axis and two offside B6 rings capped by two Be atoms. The Be2-B24 bonding is best described as Be22+ in an excited triplet state, forming two highly polarized covalent bonds with B24- in a quartet spin state. The unique ability of beryllium to make strong covalent and electrostatic interactions makes the Be2B24+ cluster stable in such an unusual geometry.
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Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 270, Santiago 7550196, Chile
| | - Jose Luis Cabellos-Quiroz
- Universidad Politécnica de Tapachula, Carretera Tapachula a Puerto Madero km 24 + 300, San Benito, Puerto Madero C.P., Tapachula, Chiapas 30830, Mexico
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Sudip Pan
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Straße, Marburg 35043, Germany
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.,Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, Jilin University, Changchun 130023, China
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26
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Dong X, Liu YQ, Liu XB, Pan S, Cui ZH, Merino G. Be4B12+: A Covalently Bonded Archimedean Beryllo‐Borospherene. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xue Dong
- Jilin University Institute of Atomic and Molecular Physics CHINA
| | - Yu-qian Liu
- Jilin University Institute of Atomic and Molecular Physics CHINA
| | - Xin-bo Liu
- Jilin University Institute of Atomic and Molecular Physics CHINA
| | - Sudip Pan
- University of Marburg: Philipps-Universitat Marburg Fachbereich Chemie Descending Number of Current Assignments GERMANY
| | - Zhong-hua Cui
- Jilin University Institute of Atomic and Molecular Physics CHINA
| | - Gabriel Merino
- Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional Fisica Aplicada Km. 6 Antigua carretera a Progreso Apdo. Postal 73, Cordemex 97310 Merida MEXICO
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27
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Chen C, Wang MH, Feng LY, Zhao LQ, Guo JC, Zhai HJ, Cui ZH, Pan S, Merino G. Bare and ligand protected planar hexacoordinate silicon in SiSb 3M 3 + (M = Ca, Sr, Ba) clusters. Chem Sci 2022; 13:8045-8051. [PMID: 35919428 PMCID: PMC9278486 DOI: 10.1039/d2sc01761j] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/10/2022] [Indexed: 11/21/2022] Open
Abstract
The occurrence of planar hexacoordination is very rare in main group elements. We report here a class of clusters containing a planar hexacoordinate silicon (phSi) atom with the formula SiSb3M3 + (M = Ca, Sr, Ba), which have D 3h (1A1') symmetry in their global minimum structure. The unique ability of heavier alkaline-earth atoms to use their vacant d atomic orbitals in bonding effectively stabilizes the peripheral ring and is responsible for covalent interaction with the Si center. Although the interaction between Si and Sb is significantly stronger than the Si-M one, sizable stabilization energies (-27.4 to -35.4 kcal mol-1) also originated from the combined electrostatic and covalent attraction between Si and M centers. The lighter homologues, SiE3M3 + (E = N, P, As; M = Ca, Sr, Ba) clusters, also possess similar D 3h symmetric structures as the global minima. However, the repulsive electrostatic interaction between Si and M dominates over covalent attraction making the Si-M contacts repulsive in nature. Most interestingly, the planarity of the phSi core and the attractive nature of all the six contacts of phSi are maintained in N-heterocyclic carbene (NHC) and benzene (Bz) bound SiSb3M3(NHC)6 + and SiSb3M3(Bz)6 + (M = Ca, Sr, Ba) complexes. Therefore, bare and ligand-protected SiSb3M3 + clusters are suitable candidates for gas-phase detection and large-scale synthesis, respectively.
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Affiliation(s)
- Chen Chen
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University Changchun 130021 China
| | - Meng-Hui Wang
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University Changchun 130021 China
| | - Lin-Yan Feng
- Nanocluster Laboratory, Institute of Molecular Science, Shanxi University Taiyuan 030006 China
| | - Lian-Qing Zhao
- Nanocluster Laboratory, Institute of Molecular Science, Shanxi University Taiyuan 030006 China
| | - Jin-Chang Guo
- Nanocluster Laboratory, Institute of Molecular Science, Shanxi University Taiyuan 030006 China
| | - Hua-Jin Zhai
- Nanocluster Laboratory, Institute of Molecular Science, Shanxi University Taiyuan 030006 China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University Changchun 130021 China
| | - Sudip Pan
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Gabriel Merino
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex 97310 Mérida Yuc. Mexico
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