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Deng G, Pan S, Dong X, Wang G, Zhao L, Zhou M, Frenking G. CO-Induced Dinitrogen Fixation and Cleavage Mediated by Boron. Chemistry 2021; 27:2131-2137. [PMID: 32990332 PMCID: PMC7898689 DOI: 10.1002/chem.202004357] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Indexed: 12/17/2022]
Abstract
The boron atoms react with carbon monoxide and dinitrogen forming the end-on bonded NNBCO complex in solid neon or in nitrogen matrices. The NNBCO complex rearranges to the (η2 -N2 )BCO isomer with a more activated side-on bonded dinitrogen ligand upon visible light excitation. (η2 -N2 )BCO and its weakly CO-coordinated complexes further isomerize to the NBNCO and B(NCO)2 molecules with N-N bond being completely cleaved under UV light irradiation. The geometries, energies and vibrational spectra of the molecules are calculated with quantum chemical methods and the electronic structures are analyzed with charge- and energy-partitioning methods.
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Affiliation(s)
- Guohai Deng
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
| | - Xuelin Dong
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Guanjun Wang
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Lili Zhao
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816China
| | - Mingfei Zhou
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Gernot Frenking
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
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52
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Gorantla SMNVT, Pan S, Mondal KC, Frenking G. Revisiting the Bonding Scenario of Two Donor Ligand Stabilized C 2 Species. J Phys Chem A 2021; 125:291-301. [PMID: 33369414 DOI: 10.1021/acs.jpca.0c09951] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantum chemical calculations using density functional methods were performed for complexes of type L2C2 with L = NHCMe (1), SNHCMe (2) (S = saturated), cAACMe (3), and diamidocarbene (DACMe) (4). The equilibrium structures of 1-4 possess almost linear C4 cores. A high thermochemical stability of the complexes with respect to dissociation, L2C2 → C2 + 2L, is indicated by the large bond dissociation energy following the order 3 > 4 > 2 > 1. The results show that the use of SNHCMe and DACMe as ligands is preferable over NHCMe. The bonding analysis using charge and energy decomposition methods reveals that (cAACMe)2C2 and (DACMe)2C2 possess genuine cumulene C4 moieties, which results from the electron-sharing bonding between quintet L2 and quintet C2 fragments. In contrast, the bonding in (NHCMe)2C2 and (SNHCMe)2C2 comes from a combination of dative and electron-sharing interactions between doublet L2+ and doublet C2- fragments.
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Affiliation(s)
- Sai Manoj N V T Gorantla
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, India.,Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Sudip Pan
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany.,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Kartik Chandra Mondal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, India
| | - Gernot Frenking
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany.,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
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53
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Deng G, Pan S, Jin J, Wang G, Zhao L, Zhou M, Frenking G. Generation and Identification of the Linear OCBNO and OBNCO Molecules with 24 Valence Electrons. Chemistry 2021; 27:412-418. [PMID: 33104262 PMCID: PMC7839540 DOI: 10.1002/chem.202003886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Indexed: 11/23/2022]
Abstract
Two structural isomers containing five second-row element atoms with 24 valence electrons were generated and identified by matrix-isolation IR spectroscopy and quantum chemical calculations. The OCBNO complex, which is produced by the reaction of boron atoms with mixtures of carbon monoxide and nitric oxide in solid neon, rearranges to the more stable OBNCO isomer on UV excitation. Bonding analysis indicates that the OCBNO complex is best described by the bonding interactions between a triplet-state boron cation with an electron configuration of (2s)0 (2pσ )0 (2pπ )2 and the CO/NO- ligands in the triplet state forming two degenerate electron-sharing π bonds and two ligand-to-boron dative σ bonds.
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Affiliation(s)
- Guohai Deng
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438P.R. China
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing211816P.R. China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
| | - Jiaye Jin
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438P.R. China
| | - Guanjun Wang
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438P.R. China
| | - Lili Zhao
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing211816P.R. China
| | - Mingfei Zhou
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of, Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438P.R. China
| | - Gernot Frenking
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing211816P.R. China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
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Hodorowicz M, Jurowska A, Szklarzewicz J. Unusual structural changes going from Li + to Cs + in [W(CN) 6(bpy)] 2− ion salts: the Na + case. CrystEngComm 2021. [DOI: 10.1039/d1ce00328c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two sodium salts with the [W(CN)6(bpy)]2− ion were synthesized and compared to Li+, K+, Rb+ and Cs+ structures. The comparison of molecular packing, inter- and intra-molecular interactions and cation properties is discussed.
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Affiliation(s)
| | - Anna Jurowska
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Kraków
- Poland
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Stegner P, Färber C, Zenneck U, Knüpfer C, Eyselein J, Wiesinger M, Harder S. Metallic Barium: A Versatile and Efficient Hydrogenation Catalyst. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202014326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Philipp Stegner
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Christian Färber
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Ulrich Zenneck
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Christian Knüpfer
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Jonathan Eyselein
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Michael Wiesinger
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Sjoerd Harder
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
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56
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Bohnenberger J, Kratzert D, Gorantla SMNVT, Pan S, Frenking G, Krossing I. Group 6 Hexacarbonyls as Ligands for the Silver Cation: Syntheses, Characterization, and Analysis of the Bonding Compared with the Isoelectronic Group 5 Hexacarbonylates. Chemistry 2020; 26:17203-17211. [PMID: 32964504 PMCID: PMC7839444 DOI: 10.1002/chem.202003934] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/14/2020] [Indexed: 12/22/2022]
Abstract
The syntheses of the two novel complexes [Ag{Mo/W(CO)6 }2 ]+ [F-{Al(ORF )3 }2 ]- (RF =C(CF3 )3 ) are reported along with their structural and spectroscopic characterization. The X-ray structure shows that three carbonyl ligands from each M(CO)6 fragment bend towards the silver atom within binding Ag-C distance range. DFT calculations of the free cations [Ag{M(CO)6 }2 ]+ (M=Cr, Mo, W) in the electronic singlet state give equilibrium structures with C2 symmetry with two bridging carbonyl groups from each hexacarbonyl ligand. Similar structures with C2 symmetry (M=Nb) and D2 symmetry (M=V, Ta) are calculated for the isoelectronic group 5 anions [Ag{M(CO)6 }2 ]- (M=V, Nb, Ta). The electronic structure of the cations is analyzed with the QTAIM and EDA-NOCV methods, which provide detailed information about the nature of the chemical bonds between Ag+ and the {M(CO)6 }2 q (q = -2, M = V, Nb, Ta; q = 0, M = Cr, Mo, W) ligands.
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Affiliation(s)
- Jan Bohnenberger
- Institut für Anorganische und Analytische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2179104FreiburgGermany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2179104FreiburgGermany
| | | | - Sudip Pan
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Straße35032MarburgGermany
| | - Gernot Frenking
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Straße35032MarburgGermany
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816P. R. China
| | - Ingo Krossing
- Institut für Anorganische und Analytische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2179104FreiburgGermany
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57
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Gorantla SMNVT, Pan S, Mondal KC, Frenking G. Stabilization of Linear C 3 by Two Donor Ligands: A Theoretical Study of L-C 3 -L (L=PPh 3 , NHC Me , cAAC Me )*. Chemistry 2020; 26:14211-14220. [PMID: 32743817 PMCID: PMC7702110 DOI: 10.1002/chem.202003064] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Indexed: 12/18/2022]
Abstract
Quantum chemical studies using density functional theory and ab initio methods have been carried out for the molecules L-C3 -L with L=PPh3 (1), NHCMe (2, NHC=N-heterocyclic carbene), and cAACMe (3, cAAC=cyclic (alkyl)(amino) carbene). The calculations predict that 1 and 2 have equilibrium geometries where the ligands are bonded with rather acute bonding angles at the linear C3 moiety. The phosphine adduct 1 has a synclinal (gauche) conformation whereas 2 exhibits a trans conformation of the ligands. In contrast, the compound 3 possesses a nearly linear arrangement of the carbene ligands at the C3 fragment. The bond dissociation energies of the ligands have the order 1<2<3. The bonding analysis using charge and energy decomposition methods suggests that 3 is best described as a cumulene with electron-sharing double bonds between neutral fragments (cAACMe )2 and C3 in the respective electronic quintet state yielding (cAACMe )=C3 =(cAACMe ). In contrast, 1 and 2 possess electron-sharing and dative bonds between positively charged ligands [(PPh3 )2 ]+ or [(NHCMe )2 ]+ and negatively charged [C3 ]- fragments in the respective doublet state.
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Affiliation(s)
| | - Sudip Pan
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Straße35032MarburgGermany
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816P. R. China
| | | | - Gernot Frenking
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Straße35032MarburgGermany
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816P. R. China
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58
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Fernández I, Holzmann N, Frenking G. The Valence Orbitals of the Alkaline-Earth Atoms. Chemistry 2020; 26:14194-14210. [PMID: 32666598 PMCID: PMC7702052 DOI: 10.1002/chem.202002986] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Indexed: 11/24/2022]
Abstract
Quantum chemical calculations of the alkaline-earth oxides, imides and dihydrides of the alkaline-earth atoms (Ae=Be, Mg, Ca, Sr, Ba) and the calcium cluster Ca6 H9 [N(SiMe3 )2 ]3 (pmdta)3 (pmdta=N,N,N',N'',N''-pentamethyldiethylenetriamine) have been carried out by using density functional theory. Analysis of the electronic structures by charge and energy partitioning methods suggests that the valence orbitals of the lighter atoms Be and Mg are the (n)s and (n)p orbitals. In contrast, the valence orbitals of the heavier atoms Ca, Sr and Ba comprise the (n)s and (n-1)d orbitals. The alkaline-earth metals Be and Mg build covalent bonds like typical main-group elements, whereas Ca, Sr and Ba covalently bind like transition metals. The results not only shed new light on the covalent bonds of the heavier alkaline-earth metals, but are also very important for understanding and designing experimental studies.
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Affiliation(s)
- Israel Fernández
- Departamento de Química Orgánica ICentro de Innovación en, Química Avanzada (ORFEO-CINQA)Facultad de Ciencias QuímicasUniversidad Complutense de Madrid28040MadridSpain
| | - Nicole Holzmann
- Research Center for Computer-Aided Drug DiscoveryShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
| | - Gernot Frenking
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435032MarburgGermany
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for, Advanced MaterialsNanjing Tech UniversityNanjing211816China
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Almáši M, Zeleňák V, Gyepes R, Zauška Ľ, Bourrelly S. A series of four novel alkaline earth metal-organic frameworks constructed of Ca(ii), Sr(ii), Ba(ii) ions and tetrahedral MTB linker: structural diversity, stability study and low/high-pressure gas adsorption properties. RSC Adv 2020; 10:32323-32334. [PMID: 35516486 PMCID: PMC9056647 DOI: 10.1039/d0ra05145d] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/20/2020] [Indexed: 12/19/2022] Open
Abstract
A series of four novel microporous alkaline earth metal–organic frameworks (AE-MOFs) containing methanetetrabenzoate linker (MTB) with composition {[Ca4(μ8-MTB)2]·2DMF·4H2O}n (UPJS-6), {[Ca4(μ4-O)(μ8-MTB)3/2(H2O)4]·4DMF·4H2O}n (UPJS-7), {[Sr3(μ7-MTB)3/2]·4DMF·7H2O}n (UPJS-8) and {[Ba3(μ7-MTB)3/2(H2O)6]·2DMF·4H2O}n (UPJS-9) (UPJS = University of Pavol Jozef Safarik) have been successfully prepared and characterized. The framework stability and thermal robustness of prepared materials were investigated using thermogravimetric analysis (TGA) and high-energy powder X-ray diffraction (HE-PXRD). MOFs were tested as adsorbents for different gases at various pressures and temperatures. Nitrogen and argon adsorption showed that the activated samples have moderate BET surface areas: 103 m2 g−1 (N2)/126 m2 g−1 (Ar) for UPJS-7′′, 320 m2 g−1 (N2)/358 m2 g−1 (Ar) for UPJS-9′′ and UPJS-8′′ adsorbs only a limited amount of N2 and Ar. It should be noted that all prepared compounds adsorb carbon dioxide with storage capacities ranging from 3.9 to 2.4 wt% at 20 °C and 1 atm, and 16.4–13.5 wt% at 30 °C and 20 bar. Methane adsorption isotherms show no adsorption at low pressures and with increasing pressure the storage capacity increases to 4.0–2.9 wt% of CH4 at 30 °C and 20 bar. Compounds displayed the highest hydrogen uptake of 3.7–1.8 wt% at −196 °C and 800 Torr among MTB containing MOFs. Four novel microporous alkaline earth metal–organic frameworks (AE-MOFs) containing methanetetrabenzoate linker (MTB): UPJS-6, UPJS-7, UPJS-8 and UPJS-9 have been successfully prepared, characterized and tested as adsorbents for different gases.![]()
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Affiliation(s)
- Miroslav Almáši
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University Moyzesova 11 SK-041 54 Košice Slovak Republic
| | - Vladimír Zeleňák
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University Moyzesova 11 SK-041 54 Košice Slovak Republic
| | - Róbert Gyepes
- Department of Inorganic Chemistry, Faculty of Science, Charles University Hlavova 2030 CZ-128 43 Prague Czech Republic
| | - Ľuboš Zauška
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University Moyzesova 11 SK-041 54 Košice Slovak Republic
| | - Sandrine Bourrelly
- Aix-Marseille University, CNRS, MADIREL Marseille Cedex 20 F-133 97 France
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Stegner P, Färber C, Oetzel J, Siemeling U, Wiesinger M, Langer J, Pan S, Holzmann N, Frenking G, Albold U, Sarkar B, Harder S. d-d Dative Bonding Between Iron and the Alkaline-Earth Metals Calcium, Strontium, and Barium. Angew Chem Int Ed Engl 2020; 59:14615-14620. [PMID: 32463527 PMCID: PMC7496664 DOI: 10.1002/anie.202005774] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Indexed: 12/31/2022]
Abstract
Double deprotonation of the diamine 1,1'-(tBuCH2 NH)-ferrocene (1-H2 ) by alkaline-earth (Ae) or EuII metal reagents gave the complexes 1-Ae (Ae=Mg, Ca, Sr, Ba) and 1-Eu. 1-Mg crystallized as a monomer while the heavier complexes crystallized as dimers. The Fe⋅⋅⋅Mg distance in 1-Mg is too long for a bonding interaction, but short Fe⋅⋅⋅Ae distances in 1-Ca, 1-Sr, and 1-Ba clearly support intramolecular Fe⋅⋅⋅Ae bonding. Further evidence for interactions is provided by a tilting of the Cp rings and the related 1 H NMR chemical-shift difference between the Cp α and β protons. While electrochemical studies are complicated by complex decomposition, UV/Vis spectral features of the complexes support Fe→Ae dative bonding. A comprehensive bonding analysis of all 1-Ae complexes shows that the heavier species 1-Ca, 1-Sr, and 1-Ba possess genuine Fe→Ae bonds which involve vacant d-orbitals of the alkaline-earth atoms and partially filled d-orbitals on Fe. In 1-Mg, a weak Fe→Mg donation into vacant p-orbitals of the Mg atom is observed.
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Affiliation(s)
- Philipp Stegner
- Chair of Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Christian Färber
- Chair of Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Jan Oetzel
- Institute of ChemistryUniversity of KasselHeinrich-Plett-Str. 4034132KasselGermany
| | - Ulrich Siemeling
- Institute of ChemistryUniversity of KasselHeinrich-Plett-Str. 4034132KasselGermany
| | - Michael Wiesinger
- Chair of Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Jens Langer
- Chair of Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Sudip Pan
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Str. 435043MarburgGermany
| | - Nicole Holzmann
- Research Center for Computer-Aided Drug DiscoveryShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
| | - Gernot Frenking
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Str. 435043MarburgGermany
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
| | - Uta Albold
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Biprajit Sarkar
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
- Chair of Inorganic Coordination ChemistryInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Sjoerd Harder
- Chair of Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
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Preise der GDCh und DBG 2020. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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GDCh and DBG Awards 2020. Angew Chem Int Ed Engl 2020; 59:11189-11190. [DOI: 10.1002/anie.202005849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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63
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Stegner P, Färber C, Oetzel J, Siemeling U, Wiesinger M, Langer J, Pan S, Holzmann N, Frenking G, Albold U, Sarkar B, Harder S. d–d Dative Bonding Between Iron and the Alkaline‐Earth Metals Calcium, Strontium, and Barium. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005774] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Philipp Stegner
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Christian Färber
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Jan Oetzel
- Institute of Chemistry University of Kassel Heinrich-Plett-Str. 40 34132 Kassel Germany
| | - Ulrich Siemeling
- Institute of Chemistry University of Kassel Heinrich-Plett-Str. 40 34132 Kassel Germany
| | - Michael Wiesinger
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Jens Langer
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Sudip Pan
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Str. 4 35043 Marburg Germany
| | - Nicole Holzmann
- Research Center for Computer-Aided Drug Discovery Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China
| | - Gernot Frenking
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Str. 4 35043 Marburg Germany
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing 211816 China
| | - Uta Albold
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstraße 34–36 14195 Berlin Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstraße 34–36 14195 Berlin Germany
- Chair of Inorganic Coordination Chemistry Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Sjoerd Harder
- Chair of Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
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Deng G, Pan S, Wang G, Zhao L, Zhou M, Frenking G. Side-On Bonded Beryllium Dinitrogen Complexes. Angew Chem Int Ed Engl 2020; 59:10603-10609. [PMID: 32196126 PMCID: PMC7317369 DOI: 10.1002/anie.202002621] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/17/2020] [Indexed: 01/26/2023]
Abstract
The preparation and spectroscopic identification of the complexes NNBe(η2 -N2 ) and (NN)2 Be(η2 -N2 ) and the energetically higher lying isomers Be(NN)2 and Be(NN)3 are reported. NNBe(η2 -N2 ) and (NN)2 Be(η2 -N2 ) are the first examples of covalently side-on bonded N2 adducts of a main-group element. The analysis of the electronic structure using modern methods of quantum chemistry suggests that NNBe(η2 -N2 ) and (NN)2 Be(η2 -N2 ) should be classified as π complexes rather than metalladiazirines.
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Affiliation(s)
- Guohai Deng
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
| | - Guanjun Wang
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Lili Zhao
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
| | - Mingfei Zhou
- Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryShanghai Key Laboratory of Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai200438China
| | - Gernot Frenking
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
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Jian J, Wu X, Chen M, Zhou M. Boron-Mediated Carbon-Carbon Bond Cleavage and Rearrangement of Benzene Forming the Borepinyl Radical and Borole Derivatives. J Am Chem Soc 2020; 142:10079-10086. [PMID: 32383858 DOI: 10.1021/jacs.0c02131] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The reaction of atomic boron with benzene in solid neon has been investigated by matrix isolation infrared spectroscopy with isotopic substitutions as well as quantum chemical calculations. The reaction is initiated by boron atom addition to benzene in forming an η2-(1, 4) π adduct (A). A borepinyl radical (B) formed by C-C bond insertion is also observed on annealing. The η2-(1,4) π adduct photoisomerizes to an unprecedented borole substituted vinyl radical intermediate (C) via ring-opening and rearrangement reactions involving an antiaromatic borole subunit. A previously unconsidered 1-ethynyl-2-dihydro-1H-borole radical (D) is generated as the final product under UV light irradiation. The results presented herein give new insight into the benzene carbon-carbon bond cleavage and rearrangement reactions mediated by a nonmetal and provide a possible route for the construction of heterocyclic borepinyl and borole species via benzene ring opening and rearrangement reactions.
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Affiliation(s)
- Jiwen Jian
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou 311231, China
| | - Xuan Wu
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative materials, Fudan University, Shanghai 200433, China
| | - Mohua Chen
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative materials, Fudan University, Shanghai 200433, China
| | - Mingfei Zhou
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative materials, Fudan University, Shanghai 200433, China
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Deng G, Pan S, Wang G, Zhao L, Zhou M, Frenking G. Side‐On Bonded Beryllium Dinitrogen Complexes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002621] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Guohai Deng
- Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials Fudan University Shanghai 200438 China
| | - Sudip Pan
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing 211816 China
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Guanjun Wang
- Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials Fudan University Shanghai 200438 China
| | - Lili Zhao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing 211816 China
| | - Mingfei Zhou
- Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials Fudan University Shanghai 200438 China
| | - Gernot Frenking
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing 211816 China
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
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Pan S, Jana G, Saha R, Zhao L, Chattaraj PK. Intriguing structural, bonding and reactivity features in some beryllium containing complexes. Phys Chem Chem Phys 2020; 22:27476-27495. [DOI: 10.1039/d0cp04912c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We highlighted our contributions to Be chemistry which include bond-stretch isomerism in Be32− species, Be complexes bound with noble gas, CO, and N2, Be based nanorotors, and intriguing bonding situations in some Be complexes.
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Affiliation(s)
- Sudip Pan
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing
| | - Gourhari Jana
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
| | - Ranajit Saha
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
| | - Lili Zhao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing
| | - Pratim K. Chattaraj
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
- Department of Chemistry
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68
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Saha R, Pan S, Chattaraj PK, Merino G. Filling the void: controlled donor-acceptor interaction facilitates the formation of an M-M single bond in the zero oxidation state of M (M = Zn, Cd, Hg). Dalton Trans 2020; 49:1056-1064. [PMID: 31848549 DOI: 10.1039/c9dt04213j] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The intriguing question of whether it is possible to form a genuine M0-M0 single bond for the M2 species (M = Zn, Cd, Hg) is addressed here. So far, all the bonds reported in the literature are exclusively MI-MI. Herein, we present viable M2(NHBMe)2 (M = Zn, Cd, Hg; NHBMe = (HCNMe)2B) complexes in which the controlled donor-acceptor interaction leads to an M0-M0 single bond. In these complexes, M2 in the 1∑g ground state with the (nσg+)2(nσu+)2 (n = 7, 10 and 14 for M = Zn, Cd and Hg, respectively) valence electron configuration forms donor-acceptor bonding with singlet 2NHBMe ligands where a combined effect of dominant (+,-) σ-backdonation from the antibonding (nσu+)2 orbital of M2 to the 2NHBMe ligands and a somewhat weaker (+,+) σ-donation from the 2NHBMe ligands to the bonding (n + 1)σg+ orbital leads to the unorthodox bonding situation of forming an M-M single bond in the zero oxidation state by eventually nullifying one effect by another. This is an unprecedented situation in the sense that the NHBMe ligand acts as a strong σ-acceptor and a weaker σ-donor. A comparison with the experimentally reported M2(PhDipp)2 complexes reveals the uniqueness of the NHBMe ligand in exhibiting such a bonding scenario. The M2(NHBMe)2 complex is thermochemically viable with respect to possible dissociation channels at room temperature, except for metal extrusion processes, M2(NHBMe)2 → M + M(NHBMe)2 and M2(NHBMe)2 → M2 + (NHBMe)2. Although the latter two processes are exergonic, they are kinetically protected by a high free energy barrier of 26.5-39.5 kcal mol-1. The experimental characterization of M2(PhDipp)2 despite similar exergonic channels reveals such kinetic stability to be enough for the viability of the M2(NHBMe)2 complexes. Furthermore, the ligand exchange reaction considering M2(PhMe)2 as the starting material also turned out to be feasible. Therefore, the M2(NHBMe)2 complexes are the first cases that feature a neutral M2 moiety with a single M0-M0 covalent bond, where M is a Group 12 metal.
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Affiliation(s)
- Ranajit Saha
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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Pan S, Frenking G. Comment on “Revisiting π backbonding: the influence of d orbitals on metal–CO bonds and ligand red shifts” by D. Koch, Y. Chen, P. Golub and S. Manzhos, Phys. Chem. Chem. Phys., 2019, 21, 20814. Phys Chem Chem Phys 2020; 22:5377-5379. [DOI: 10.1039/c9cp05951b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We challenge the statement of Koch et al. that the M → CO charge transfer and the decrease of the CO stretching frequency in metal carbonyl complexes do not depend on the metal d orbitals.
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Affiliation(s)
- Sudip Pan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, Marburg 35032, Germany
| | - Gernot Frenking
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, Marburg 35032, Germany
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Wang Q, Pan S, Wu Y, Deng G, Bian J, Wang G, Zhao L, Zhou M, Frenking G. Transition-Metal Chemistry of Alkaline-Earth Elements: The Trisbenzene Complexes M(Bz) 3 (M=Sr, Ba). Angew Chem Int Ed Engl 2019; 58:17365-17374. [PMID: 31498532 PMCID: PMC6900055 DOI: 10.1002/anie.201908572] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/06/2019] [Indexed: 11/05/2022]
Abstract
We report the synthesis and spectroscopic identification of the trisbenzene complexes of strontium and barium M(Bz)3 (M=Sr, Ba) in low-temperature Ne matrix. Both complexes are characterized by a D3 symmetric structure involving three equivalent η6 -bound benzene ligands and a closed-shell singlet electronic ground state. The analysis of the electronic structure shows that the complexes exhibit metal-ligand bonds that are typical for transition metal compounds. The chemical bonds can be explained in terms of weak donation from the π MOs of benzene ligands into the vacant (n-1)d AOs of M and strong backdonation from the occupied (n-1)d AO of M into vacant π* MOs of benzene ligands. The metals in these 20-electron complexes have 18 effective valence electrons, and, thus, fulfill the 18-electron rule if only the metal-ligand bonding electrons are counted. The results suggest that the heavier alkaline earth atoms exhibit the full bonding scenario of transition metals.
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Affiliation(s)
- Qian Wang
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy MaterialsShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai200433China
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
| | - Yan‐Bo Wu
- Institute of Molecular ScienceShanxi UniversityTaiyuan030006China
| | - Guohai Deng
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy MaterialsShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai200433China
| | - Jian‐Hong Bian
- Institute of Molecular ScienceShanxi UniversityTaiyuan030006China
| | - Guanjun Wang
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy MaterialsShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai200433China
| | - Lili Zhao
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
| | - Mingfei Zhou
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy MaterialsShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai200433China
| | - Gernot Frenking
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing211816China
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Strasse 435043MarburgGermany
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