1
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Vásquez-Espinal A, Pino-Rios R. Planar tetracoordinate beryllium compounds with a partially covalent Be-Ng bond. Phys Chem Chem Phys 2024; 26:16687-16692. [PMID: 38809129 DOI: 10.1039/d4cp00468j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
An analysis of the thermodynamic and kinetic stability and the nature of the chemical bond in hypercoordinated compounds with the formula BeH3Ng+ (Ng = He-Rn) through high-level calculations is presented in this work. Thermochemical calculations show that, for the heavier noble gases (Ar-Rn), these systems are thermodynamically stable at room temperature; however, this stability decreases due to a weakening of the Be-H2 interaction, while the Be-Ng bond strengthens going down the periodic table. These results are complemented by Born Oppenheimer molecular dynamics simulations, in which the increasing tendency to dissociate the Be-H2 bond is evidenced. The nature of the chemical bonding depends on the analysis performed. On the one hand, the interacting quantum atoms method indicates that the covalent contribution is around 25 to 30%. On the other hand, the electron density topology indicates a covalent nature for compounds with Kr-Rn, while Hirshfeld population analysis in conjunction with Mayer's bond order establishes polar covalent behavior. The geometrical parameters and natural energy decomposition analysis (NEDA) indicate a covalent nature, allowing us to consider that the Be-Ng bond has a partially covalent character.
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Affiliation(s)
- Alejandro Vásquez-Espinal
- Química y Farmacia, Facultad de Ciencias de la Salud, Universidad Arturo Prat, Casilla 121, Iquique 1100000, Chile.
| | - Ricardo Pino-Rios
- Química y Farmacia, Facultad de Ciencias de la Salud, Universidad Arturo Prat, Casilla 121, Iquique 1100000, Chile.
- Centro de Investigación Medicina de Altura - CEIMA, Universidad Arturo Prat, Casilla 121, Iquique 1100000, Chile
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2
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Yashmin F, Sharma R, Mazumder LJ, Sharma PK. Noble gas dative bonding with coinage metal carbene complexes: A theoretical study. J Comput Chem 2024; 45:536-545. [PMID: 37994117 DOI: 10.1002/jcc.27253] [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: 08/01/2023] [Revised: 09/28/2023] [Accepted: 10/28/2023] [Indexed: 11/24/2023]
Abstract
The structure and stability of noble gas (Ng) bound [NHCM]+ complexes (M = Cu, Ag, and Au) were investigated using Quantum chemical calculations. Dissociation energies, enthalpy, and free energy changes were computed to comprehend the stability of these Ng-bonded complexes. The nature of interactions associated to the bonding between metal and noble gas atoms was studied through the computation of electron density-based descriptors. Detailed electronic structure study revealed electron donation from the noble gas atoms towards the metal center, resulting in the formation of dative bonds.
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Affiliation(s)
- Farnaz Yashmin
- Department of Chemistry, Cotton University, Guwahati, India
| | - Rohan Sharma
- Department of Chemistry, Cotton University, Guwahati, India
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3
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Pal R, Chattaraj PK. Structure, stability, reactivity and bonding in noble gas compounds. Phys Chem Chem Phys 2024; 26:9856-9866. [PMID: 38497096 DOI: 10.1039/d3cp06321f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Noble gases (Ngs) are recognized as the least reactive elements due to their fully filled valence electronic configuration. Their reluctance to engage in chemical bond formation necessitates extreme conditions such as low temperatures, high pressures, and reagents with high reactivity. In this Perspective, we discuss our endeavours in the theoretical prediction of viable Ng complexes, emphasizing the pursuit of synthesizing them under nearly ambient conditions. Our research encompasses various bonding categories of Ng complexes and our primary aim is to comprehend the bonding mechanisms within these complexes, utilizing state-of-the-art theoretical tools such as natural bond orbital, energy decomposition, and electron density analyses. These complex types manifest distinct bonding scenarios. In the non-insertion type, the donor-acceptor interaction strength hinges on the polarizing ability of the binding atom, drawing the electron density of the Ng towards itself. In certain instances, especially with heavier Ng elements, this interaction reaches a magnitude where it can be considered a covalent bond. Conversely, in most insertion cases, the Ng prefers to share electrons to form a covalent bond on one side while interacting electrostatically on the other side. In rare cases, both bonds may be portrayed as electron-shared covalent bonds. Furthermore, a host cage serves as an excellent platform to explore the limits of achieving Ng-Ng bonds (even for helium), under high pressure.
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Affiliation(s)
- Ranita Pal
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Birla Institute of Technology Mesra, Ranchi, Jharkhand 835215, India.
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4
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Borocci S, Cecchi P, Grandinetti F, Sanna N, Zazza C. Noble gas hydrides: theoretical prediction of the first group of anionic species. Phys Chem Chem Phys 2024; 26:7377-7387. [PMID: 38376451 DOI: 10.1039/d3cp05623f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
The first group of anionic noble-gas hydrides with the general formula HNgBeO- (Ng = Ar, Kr, Xe, Rn) is predicted through MP2, Coupled-Cluster, and Density Functional Theory computations employing correlation-consistent atomic basis sets. We derive that these species are stable with respect to the loss of H, H-, BeO, and BeO-, but unstable with respect to Ng + HBeO-. The energy barriers of the latter process are, however, high enough to suggest the conceivable existence of the heaviest HNgBeO- species as metastable in nature. Their stability arises from the interaction of the H- moiety with the positively-charged Ng atoms, particularly with the σ-hole ensuing from their ligation to BeO. This actually promotes relatively tight Ng-H bonds featuring a partially-covalent character, whose degree progressively increases when going from HArBeO- to HRnBeO-. The HNgBeO- compounds are also briefly compared with other noble-gas anions observed in the gas phase or isolated in crystal lattices.
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Affiliation(s)
- Stefano Borocci
- Dipartimento per la Innovazione nei sistemi Biologici, Agroalimentari e Forestali (DIBAF), Università della Tuscia, L.go dell'Università, s.n.c., 01100 Viterbo, Italy.
- Istituto per i Sistemi Biologici del CNR (ISB), Sede di Roma - Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, Rome, Italy
| | - Patrizio Cecchi
- Dipartimento per la Innovazione nei sistemi Biologici, Agroalimentari e Forestali (DIBAF), Università della Tuscia, L.go dell'Università, s.n.c., 01100 Viterbo, Italy.
| | - Felice Grandinetti
- Dipartimento per la Innovazione nei sistemi Biologici, Agroalimentari e Forestali (DIBAF), Università della Tuscia, L.go dell'Università, s.n.c., 01100 Viterbo, Italy.
- Istituto per i Sistemi Biologici del CNR (ISB), Sede di Roma - Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, Rome, Italy
| | - Nico Sanna
- Dipartimento per la Innovazione nei sistemi Biologici, Agroalimentari e Forestali (DIBAF), Università della Tuscia, L.go dell'Università, s.n.c., 01100 Viterbo, Italy.
- Istituto per la Scienza e Tecnologia dei Plasmi del CNR (ISTP), Via Amendola 122/D, 70126 Bari, Italy
| | - Costantino Zazza
- Dipartimento per la Innovazione nei sistemi Biologici, Agroalimentari e Forestali (DIBAF), Università della Tuscia, L.go dell'Università, s.n.c., 01100 Viterbo, Italy.
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5
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Kuntar SP, Ghosh A, Ghanty TK. Prediction of donor-acceptor-type novel noble gas complexes in the triplet electronic state. Phys Chem Chem Phys 2023; 25:6987-6994. [PMID: 36807359 DOI: 10.1039/d2cp05813h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Closed-shell noble gas (Ng) compounds in the singlet electronic state have been extensively studied in the past two decades after the revolutionary discovery of 1HArF molecule. Motivated by the experimental identification of very strong donor-acceptor-type singlet-state Ng complex 1ArOH+, in the present article, for the first time, we report new donor-acceptor-type noble gas complexes in the triplet electronic state (3NgBeN+ (Ng = He-Rn)), where most of the Ng-Be bond lengths are smaller than the corresponding covalent limits. The newly proposed complexes are predicted to be stable by various computational tools, including coupled-cluster and multireference-based methods, with strong Ng-Be bonding (40.4-196.2 kJ mol-1). We have also investigated 3NgBeP+ (Ng = He-Rn) complexes for the purpose of comparison. Various computational results, including the structural parameters, bonding energies, vibrational frequencies, and atoms-in-molecule properties suggest that it may be possible to prepare and characterize these triplet state complexes through suitable experimental technique(s).
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Affiliation(s)
- Subrahmanya Prasad Kuntar
- Homi Bhabha National Institute, Training School complex, Anushaktinagar, Mumbai 400094, India.,Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | - Ayan Ghosh
- Homi Bhabha National Institute, Training School complex, Anushaktinagar, Mumbai 400094, India.,Laser and Plasma Technology Division, Beam Technology Development Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Tapan K Ghanty
- Homi Bhabha National Institute, Training School complex, Anushaktinagar, Mumbai 400094, India.,Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400085, India.
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6
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Paul D, Dua H, Sarkar U. Confinement Effects of a Noble Gas Dimer Inside a Fullerene Cage: Can It Be Used as an Acceptor in a DSSC? Front Chem 2020; 8:621. [PMID: 32850644 PMCID: PMC7424018 DOI: 10.3389/fchem.2020.00621] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 06/15/2020] [Indexed: 02/03/2023] Open
Abstract
A detailed density functional theory investigation of He2-encapsulated fullerene C36 and C40 has been presented here. When confinement takes place, He-He bond length shortens and a non-covalent type of interaction exists between two He atoms. Energy decomposition analysis shows that though an attractive interaction exists in free He2, when it is confined inside the fullerenes, repulsive interaction is observed due to the presence of dominant repulsive energy term. Fullerene C40, with greater size, makes the incorporation of He2 much easier than C36 as confirmed from the study of boundary crossing barrier. In addition, we have studied the possibility of using He2-incorporated fullerene as acceptor material in dye-sensitized solar cell (DSSC). Based on the highest energy gap, He2@C40 and bare C40 fullerenes are chosen for this purpose. Dye constructed with He2@C40 as an acceptor has the highest light-harvesting efficiency and correspondingly will possess the maximum short circuit current as compared to pure C40 acceptor.
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Affiliation(s)
- Debolina Paul
- Department of Physics, Assam University, Silchar, India
| | - Harkishan Dua
- Department of Physics, Assam University, Silchar, India
| | - Utpal Sarkar
- Department of Physics, Assam University, Silchar, India
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7
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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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8
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Wen M, Li ZZ, Li AY. OBCN isomerization and noble gas insertion compounds of identical valence electron number species: stability and bonding. Phys Chem Chem Phys 2019; 21:26311-26323. [PMID: 31781710 DOI: 10.1039/c9cp04980k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of new noble gas (Ng) insertion compounds of the general type XNgX, XNgY and XNgY+ has been theoretically studied using ab initio and DFT methods herein. We first studied the isomerization process of the OBCN compound, and then investigated the bonding properties and stability of the compounds formed by inserting Ng into the single bond of the three low energy isomers by high-level ab initio calculations. The OBNgCN compounds are thermochemically stable with respect to all dissociation channels except for the processes of releasing OBCN/OBNC and free Ng. Furthermore, the two dissociation processes OBNgCN → Ng + OBNC and OBNgNC → Ng + OBCN are kinetically prohibited by the relatively high free energy barrier ranging from 22.7 to 31.7 kcal mol-1 except for the OBKrCN and OBKrNC analogues. And the adaptive natural density partitioning (AdNDP) analysis indicated that chemical bonding in OBNgCN compounds is realized via a delocalized 3-center 2-electron (3c-2e) σ-bond in the B-Ng-C moiety and a totally delocalized 5-center 2-electron (5c-2e) σ-bond in the whole O-B-Ng-C-N. Natural bond orbital (NBO) theory, atoms-in-molecules (AIM) and energy decomposition analysis (EDA) based on the molecular wavefunction revealed that the B-Ng bond and Ng-C bond have some covalent character in OBNgCN. In addition, the calculation and detailed bonding analysis on a large number of neutral and monocationic compounds with identical valence electron numbers to OBNgCN demonstrate that the two bonds directly linked to the Ng atoms have covalent properties in neutral compounds, whereas Ng forms one typical covalent bond and one partial covalent and partial ionic bond with the neighboring atoms in the monocationic compounds.
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Affiliation(s)
- Mei Wen
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
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9
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Li ZZ, Wen M, Li AY. Rg nBe 3B 3+: theoretical investigation of Be 3B 3+ and its rare gas capability. J Mol Model 2019; 25:349. [PMID: 31741081 DOI: 10.1007/s00894-019-4248-4] [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: 09/03/2019] [Accepted: 10/30/2019] [Indexed: 11/24/2022]
Abstract
A series of Be3B3+ and its rare gas (Rg) containing complexes RgnBe3B3+ (Rg = He-Rn, n = 1-6) have been predicted theoretically using the B3LYP, MP2, and CCSD(T) methods to explore structures, stability, charge distributions, and nature of bonding. Both Be3B3+ and RgBe3B3+ are the global minima on the potential energy surfaces. In the RgnBe3B3+ complexes, the dissociation energy drops with the increase in number of Rg. Natural bond orbital (NBO) and topological analysis of the electron density (AIM) show that the Rg-Be bonds for Kr-Rn have some covalent character. The Rg-Be bond is stabilized dominantly by the Rg → Be3B3+ σ-donation from the valence p orbital of Rg to the vacant valence LUMO orbital of Rgn-1Be3B3+. Besides, other two π-donations also play important roles in stabilizing the Rg-Be bonds.
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Affiliation(s)
- Zhuo Zhe Li
- School of Chemistry and Chemical Engineering, Southwest University, Tiansheng Road No. 2, Chongqing, 400715, People's Republic of China.
| | - Mei Wen
- School of Chemistry and Chemical Engineering, Southwest University, Tiansheng Road No. 2, Chongqing, 400715, People's Republic of China
| | - An Yong Li
- School of Chemistry and Chemical Engineering, Southwest University, Tiansheng Road No. 2, Chongqing, 400715, People's Republic of China.
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10
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Saha R, Jana G, Pan S, Merino G, Chattaraj PK. How Far Can One Push the Noble Gases Towards Bonding?: A Personal Account. Molecules 2019; 24:E2933. [PMID: 31412650 PMCID: PMC6719121 DOI: 10.3390/molecules24162933] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 01/29/2023] Open
Abstract
Noble gases (Ngs) are the least reactive elements in the periodic table towards chemical bond formation when compared with other elements because of their completely filled valence electronic configuration. Very often, extreme conditions like low temperatures, high pressures and very reactive reagents are required for them to form meaningful chemical bonds with other elements. In this personal account, we summarize our works to date on Ng complexes where we attempted to theoretically predict viable Ng complexes having strong bonding to synthesize them under close to ambient conditions. Our works cover three different types of Ng complexes, viz., non-insertion of NgXY type, insertion of XNgY type and Ng encapsulated cage complexes where X and Y can represent any atom or group of atoms. While the first category of Ng complexes can be thermochemically stable at a certain temperature depending on the strength of the Ng-X bond, the latter two categories are kinetically stable, and therefore, their viability and the corresponding conditions depend on the size of the activation barrier associated with the release of Ng atom(s). Our major focus was devoted to understand the bonding situation in these complexes by employing the available state-of-the-art theoretic tools like natural bond orbital, electron density, and energy decomposition analyses in combination with the natural orbital for chemical valence theory. Intriguingly, these three types of complexes represent three different types of bonding scenarios. In NgXY, the strength of the donor-acceptor Ng→XY interaction depends on the polarizing power of binding the X center to draw the rather rigid electron density of Ng towards itself, and sometimes involvement of such orbitals becomes large enough, particularly for heavier Ng elements, to consider them as covalent bonds. On the other hand, in most of the XNgY cases, Ng forms an electron-shared covalent bond with X while interacting electrostatically with Y representing itself as [XNg]+Y-. Nevertheless, in some of the rare cases like NCNgNSi, both the C-Ng and Ng-N bonds can be represented as electron-shared covalent bonds. On the other hand, a cage host is an excellent moiety to examine the limits that can be pushed to attain bonding between two Ng atoms (even for He) at high pressure. The confinement effect by a small cage-like B12N12 can even induce some covalent interaction within two He atoms in the He2@B12N12 complex.
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Affiliation(s)
- Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Gourhari Jana
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - 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.
| | - 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, Mérida 97310, Yuc., Mexico.
| | - Pratim Kumar Chattaraj
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India.
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Pan S, Jana G, Merino G, Chattaraj PK. Noble-Noble Strong Union: Gold at Its Best to Make a Bond with a Noble Gas Atom. ChemistryOpen 2019; 8:173-187. [PMID: 30740292 PMCID: PMC6356865 DOI: 10.1002/open.201800257] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 12/25/2018] [Indexed: 11/29/2022] Open
Abstract
This Review presents the current status of the noble gas (Ng)‐noble metal chemistry, which began in 1977 with the detection of AuNe+ through mass spectroscopy and then grew from 2000 onwards; currently, the field is in a somewhat matured state. On one side, modern quantum chemistry is very effective in providing important insights into the structure, stability, and barrier for the decomposition of Ng compounds and, as a result, a plethora of viable Ng compounds have been predicted. On the other hand. experimental achievement also goes beyond microscopic detection and characterization through spectroscopic techniques and crystal structures at ambient temperature; for example, (AuXe4)2+(Sb2F11−)2 have also been obtained. The bonding between two noble elements of the periodic table can even reach the covalent limit. The relativistic effect makes gold a very special candidate to form a strong bond with Ng in comparison to copper and silver. Insertion compounds, which are metastable in nature, depending on their kinetic stability, display an even more fascinating bonding situation. The degree of covalency in Ng–M (M=noble metal) bonds of insertion compounds is far larger than that in non‐insertion compounds. In fact, in MNgCN (M=Cu, Ag, Au) molecules, the M−Ng and Ng−C bonds might be represented as classical 2c–2e σ bonds. Therefore, noble metals, particularly gold, provide the opportunity for experimental chemists to obtain sufficiently stable complexes with Ng at room temperature in order to characterize them by using experimental techniques and, with the intriguing bonding situation, to explore them with various computational tools from a theoretical perspective. This field is relatively young and, in the coming years, a lot of advancement is expected experimentally as well as theoretically.
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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
| | - Gourhari Jana
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur Kharagpur 721302 India
| | - 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
| | - Pratim K Chattaraj
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur Kharagpur 721302 India.,Department of Chemistry Indian Institute of Technology Bombay Mumbai 400076 India
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12
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Ghara M, Pan S, Chattaraj PK. A theoretical investigation on boron–ligand cooperation to activate molecular hydrogen by a frustrated Lewis pair and subsequent reduction of carbon dioxide. Phys Chem Chem Phys 2019; 21:21267-21277. [DOI: 10.1039/c9cp03756j] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Activation of molecular hydrogen by a B/N frustrated Lewis pair.
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Affiliation(s)
- Manas Ghara
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur-721302
- India
| | - Sudip Pan
- Fachbereich Chemie
- Philipps-Universität Marburg Hans-Meerwein-Straße
- 35032 Marburg
- Germany
| | - Pratim K. Chattaraj
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur-721302
- India
- Department of Chemistry
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13
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Joshi M, Ghanty TK. Quantum chemical prediction of a superelectrophilic dianion and its binding with noble gas atoms. Chem Commun (Camb) 2019; 55:14379-14382. [DOI: 10.1039/c9cc08049j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A counterintuitive superelectrophilic dianion with a positive charge as well as lowest occupied molecular orbital (LUMO) localized on free-Be1 in Dianion1 embedded in the negatively charged framework, forms stable [NgBeB11(CN)11]2− compounds.
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Affiliation(s)
- Meenakshi Joshi
- Theoretical Chemistry Section
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Tapan K Ghanty
- Theoretical Chemistry Section
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
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14
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Pan S, Zhao L, Merino G. Improvement in hydrogen binding ability of closo-dicarboranes via functionalization and designing of extended frameworks. J Mol Model 2018; 24:307. [PMID: 30291513 DOI: 10.1007/s00894-018-3827-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/11/2018] [Indexed: 10/28/2022]
Abstract
Neutral closo-dicarboboranes are reported to have very low H2 binding ability. Herein, we report an improvement in H2 binding energy (Eb) of C2B4H6 by substituting H atoms with different functional groups like X = F, Cl, Br, and XY = BO, CN and NC via quantum-chemical density functional theory based computations. In going from B6H62- to C2B4H6, the Eb value is reduced from 14.6 kJ mol-1 to 2.7 kJ mol-1. C2B4X6 and C2B4(XY)6 systems, which can bind a total of eight H2 molecules, with one H2 molecule occupying at each B-B-C face, possess an Eb value per H2 in the range of 4.5 kJ mol-1 for X = F, 3.9 kJ mol-1 for X = Cl, 5.9 kJ mol-1 for X = Br, 6.8 kJ mol-1 for XY = BO, 5.8 kJ mol-1 for XY = CN and 5.2 kJ mol-1 for XY = NC. The improvement in Eb value is found to be the highest in case of C2B4(BO)6, which has the ability to bind 6.6 gravimetric wt% of H2. The situation can be made more favorable by applying an external electric field. Energy decomposition analysis reveals that although the dispersion interaction (ca. 55-65%) has significant role in binding H2 with such types of molecules, contribution from electrostatic and orbital interaction is also considerable. Further, we modeled an extended system by linking C2B4(BO)n through 'C ≡ C' units for H2 storage purpose. The energy difference between the highest occupied and the lowest unoccupied molecular orbitals gradually lessens with the increase in molecular length. Therefore, it can be tuned gradually by controlling the chain length, which may further open up their potency in the field of electronics. Graphical abstract C2B4X6 (X = F, Cl, Br) and C2B4(XY)6 (XY = BO, CN, NC) show enhanced H2 binding ability from C2B4H6. Further, 1D, 2D and 3-D frameworks can be built by joining C2B4(BO)n units via 'C ≡ C' linkage.
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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, 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, 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, Mexico.
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Jana G, Pan S, Osorio E, Zhao L, Merino G, Chattaraj PK. Cyanide-isocyanide isomerization: stability and bonding in noble gas inserted metal cyanides (metal = Cu, Ag, Au). Phys Chem Chem Phys 2018; 20:18491-18502. [PMID: 29947384 DOI: 10.1039/c8cp02837k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The internal isomerization, MNC ↔ MCN (M = Cu, Ag, Au), is investigated through quantum chemical computations. CuNC and AgNC are shown to be neither thermochemically nor kinetically stable against transformation to MCN. The free energy barrier (ΔG‡) for AuNC is somewhat considerable (7.1 kcal mol-1), indicating its viability, particularly at low temperature. Further, the Ng inserted analogues, MNgCN (M = Cu, Ag, Au; Ng = Xe, Rn) turn out to be thermochemically stable with respect to all possible dissociation channels but for two two-body dissociation channels, viz., MNgCN → Ng + MCN and MNgCN → Ng + MNC, which are connected to the internal isomerization processes, MNgCN → NgMCN and MNgCN → NgMNC, respectively. However, they are kinetically protected by substantial ΔG‡ values (11.8-15.4 kcal mol-1 for Cu, 9.8-13.6 kcal mol-1 for Ag, and 19.7-24.7 kcal mol-1 for Au). The pathways for such internal conversion are explored in detail. A thorough inspection of the bonding situation of the studied molecules, employing natural bond order, electron density, adaptive natural density partitioning, and energy decomposition analyses indicates that the M-Ng bonds in MNgCN and Ng-C bonds in AuNgCN can be represented as an electron-shared covalent bond. For the other Ng-C bonds, although an ionic description is better suited, the degree of covalent character is also substantial therein.
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Affiliation(s)
- Gourhari Jana
- Department of Chemistry and Center for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur-721302, India.
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16
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Pan S, Kar S, Saha R, Osorio E, Zarate X, Zhao L, Merino G, Chattaraj PK. Boron Nanowheels with Axles Containing Noble Gas Atoms: Viable Noble Gas Bound M©B 10- Clusters (M=Nb, Ta). Chemistry 2018; 24:3590-3598. [PMID: 29226483 DOI: 10.1002/chem.201705790] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 11/08/2022]
Abstract
The viability of noble gas axled boron nanowheels Ngn M©B10- (Ng=Ar-Rn; M=Nb, Ta; n=1, 2) is explored by ab initio computations. In the resulting Ng2 -M complexes, the Ng-M-Ng nanorod passes through the center of the B10- ring, providing them with an inverse sandwich-like structure. While in the singly Ng bound analogue, the Ng binding enthalpy Hb at 298 K ranges from 2.5 to 10.6 kcal mol-1 , in doubly Ng bound cases it becomes very low for the Ng2 M©B10- →Ng+NgM©B10- dissociation channel, except for the case of Rn, for which the corresponding Hb values are 3.4 (Nb) and 4.0 kcal mol-1 (Ta). For a given Ng, Ta has slightly higher Ng-binding ability than Nb. The corresponding free-energy changes indicate that these systems, particularly the Xe and Rn complexes, are good candidates for experimental realization in a low-temperature matrix. The Ng-M bonds were found to be covalent in nature, as reflected in their large Wiberg bond indices, formation of a 2c-2e σ orbital between Ng and M centers in natural bond orbital and adaptive natural density partitioning (AdNDP) analyses, and the short Ng-M distances. Energy decomposition analysis and a study on the natural orbitals for chemical valence show that the Ng-M contact is supported mainly by the orbital and electrostatic interactions, with almost equal contributions. Although both the Ng→M σ donation and Ng←M π backdonation play roles in the origin of orbital interaction, the former is significantly dominant over the latter. Further, AdNDP analysis indicates that the doubly aromatic character (both σ and π) in MB10- clusters is not perturbed by the interaction with Ng atoms.
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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, P. R. China
| | - Susmita Kar
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, 721302, India
| | - Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, 721302, India
| | - Edison Osorio
- Departamento de Ciencias Básicas, Universidad Católica Luis Amigó, SISCO, Transversal 51A, #67B 90, Medellín, Colombia
| | - Ximena Zarate
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Santiago, Chile
| | - 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, P. R. 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
| | - Pratim K Chattaraj
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, 721302, India
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17
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Pan S, Jana G, Ravell E, Zarate X, Osorio E, Merino G, Chattaraj PK. Stable NCNgNSi (Ng=Kr, Xe, Rn) Compounds with Covalently Bound C-Ng-N Unit: Possible Isomerization of NCNSi through the Release of the Noble Gas Atom. Chemistry 2018; 24:2879-2887. [PMID: 29194873 DOI: 10.1002/chem.201705112] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Indexed: 11/07/2022]
Abstract
Although the noble gas (Ng) compounds with either Ng-C or Ng-N bonds have been reported in the literature, compounds containing both bonds are not known. The first set of systems having a C-Ng-N bonding unit is predicted herein through the analysis of stability and bonding in the NCNgNSi (Ng=Kr-Rn) family. While the Xe and Rn inserted analogues are thermochemically stable with respect to all dissociation channels, but for the one producing CNSiN and free Ng, NCKrNSi has another additional three-body dissociation channel, NCKrNSi→CN+Kr+NSi, which is exergonic by -9.8 kcal mol-1 at 298 K. This latter dissociation can be hindered by lowering the temperature. Moreover, the NCNgNSi→Ng+CNSiN dissociation is also kinetically prohibited by a quite high free energy barrier ranging from 25.2 to 39.3 kcal mol-1 , with a gradual increase in going from Kr to Rn. Therefore, these compounds are appropriate candidates for experimental realization. A detailed bonding analysis by employing natural bond orbital, electron density, energy decomposition, and adaptive natural density partitioning analyses indicates that both Ng-N and C-Ng bonds in the title compounds are covalent in nature. In fact, the latter analysis indicates the presence of delocalized 3c-3e σ-bond within the C-Ng-N moiety and a totally delocalized 5c-2e σ-bond in these compounds. This is an unprecedented bonding characteristic in the sense that the bonding pattern in Ng inserted compounds is generally represented as the presence of covalent bond in one side of Ng, and the ionic interaction in the other side. Further, the dissociation of Ng from NCNgNSi facilitates the formation of a higher energy isomer of NCNSi, CNSiN, which cannot be formed from bare NCNSi as such, because of the very high free energy barrier associated with the isomeric transformation. Therefore, in the presence of Ng atoms it might be possible to detect the high energy isomer.
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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, P. R. China
| | - Gourhari Jana
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
| | - Estefanía Ravell
- 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
| | - Ximena Zarate
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Santiago, Chile
| | - Edison Osorio
- Departamento de Ciencias Básicas, Universidad Católica Luis Amigó, SISCO, Transversal 51A #67B 90, Medellín, Colombia
| | - 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
| | - Pratim K Chattaraj
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
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18
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Jana G, Pan S, Merino G, Chattaraj PK. MNgCCH (M = Cu, Ag, Au; Ng = Xe, Rn): The First Set of Compounds with M–Ng–C Bonding Motif. J Phys Chem A 2017; 121:6491-6499. [DOI: 10.1021/acs.jpca.7b04993] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gourhari Jana
- Department
of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, 721302 Kharagpur, India
| | - Sudip Pan
- Department
of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, 721302 Kharagpur, India
- 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, Yucatan, México
| | - 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, Yucatan, México
| | - Pratim K. Chattaraj
- Department
of Chemistry and Centre for Theoretical Studies Indian Institute of Technology Kharagpur, 721302 Kharagpur, India
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19
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PAN SUDIP, SAHA RANAJIT, GUPTA ASHUTOSH, CHATTARAJ PRATIMK. Modeling of 1-D Nanowires and analyzing their Hydrogen and Noble Gas Binding Ability. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1232-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Saha R, Pan S, Chattaraj PK. NgMCp+: Noble Gas Bound Half-Sandwich Complexes (Ng = He–Rn, M = Be–Ba, and Cp = η5-C5H5). J Phys Chem A 2017; 121:3526-3539. [DOI: 10.1021/acs.jpca.7b00389] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ranajit Saha
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sudip Pan
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pratim K. Chattaraj
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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21
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Jana G, Saha R, Pan S, Kumar A, Merino G, Chattaraj PK. Noble Gas Binding Ability of Metal-Bipyridine Monocationic Complexes (Metal=Cu, Ag, Au): A Computational Study. ChemistrySelect 2016. [DOI: 10.1002/slct.201601245] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gourhari Jana
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur- 721302 India
| | - Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur- 721302 India
| | - Sudip Pan
- 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
| | - Anand Kumar
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur- 721302 India
| | - 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
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur- 721302 India
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22
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Pan S, Saha R, Mandal S, Chattaraj PK. σ-Aromatic cyclic M3+ (M = Cu, Ag, Au) clusters and their complexation with dimethyl imidazol-2-ylidene, pyridine, isoxazole, furan, noble gases and carbon monoxide. Phys Chem Chem Phys 2016; 18:11661-76. [DOI: 10.1039/c5cp06282a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure, stability, bonding and σ-aromaticity in dimethyl imidazol-2-ylidene, pyridine, isoxazole, furan, noble gas and carbon monoxide bound M3+ (M = Cu, Ag, Au) complexes are analyzed.
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Affiliation(s)
- Sudip Pan
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
| | - Ranajit Saha
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
| | - Subhajit Mandal
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
| | - Pratim K. Chattaraj
- Department of Chemistry and Center for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
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23
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Pan S, Gupta A, Saha R, Merino G, Chattaraj PK. A coupled-cluster study on the noble gas binding ability of metal cyanides versus metal halides (metal = Cu, Ag, Au). J Comput Chem 2015; 36:2168-76. [DOI: 10.1002/jcc.24190] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 08/06/2015] [Accepted: 08/12/2015] [Indexed: 01/23/2023]
Affiliation(s)
- Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology; Kharagpur 721302 India
| | - Ashutosh Gupta
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology; Kharagpur 721302 India
- Department of Chemistry; Udai Pratap Autonomous College; Varanasi Uttar Pradesh 221002 India
| | - Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology; Kharagpur 721302 India
| | - 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
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology; Kharagpur 721302 India
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24
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Pan S, Moreno D, Ghosh S, Chattaraj PK, Merino G. Structure and stability of noble gas bound
EX3+ compounds (E = C, Ge, Sn, Pb; X = H, F, Cl, Br). J Comput Chem 2015; 37:226-36. [DOI: 10.1002/jcc.23986] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 06/02/2015] [Accepted: 06/06/2015] [Indexed: 01/23/2023]
Affiliation(s)
- Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur West Bengal 721302 India
| | - Diego Moreno
- Departamento de Física Aplicada; Centro de Investigación y de Estudios Avanzados; Unidad Mérida. Km 6 Antigua Carretera a Progreso. Apdo. Postal 73, Cordemex Mérida Yucatan 97310 México
| | - Sreyan Ghosh
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur West Bengal 721302 India
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies; Indian Institute of Technology Kharagpur; Kharagpur West Bengal 721302 India
| | - 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 Mérida Yucatan 97310 México
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25
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Saha R, Pan S, Merino G, Chattaraj PK. Comparative Study on the Noble-Gas Binding Ability of BeX Clusters (X = SO4, CO3, O). J Phys Chem A 2015; 119:6746-52. [PMID: 26024440 DOI: 10.1021/acs.jpca.5b03888] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ab initio computations are carried out to assess the noble gas (Ng) binding capability of BeSO4 cluster. We have further compared the stability of NgBeSO4 with that of the recently detected NgBeCO3 cluster. The Ng-Be bond in NgBeCO3 is somewhat weaker than that in NgBeO cluster. In NgBeSO4, the Ng-Be bond is found to be stronger compared with not only the Ng-Be bond in NgBeCO3 but also that in NgBeO, except the He case. The Ar-Rn-bound BeSO4 analogues are viable even at room temperature. The Wiberg bond indices of Be-Ng bonds and the degree of electron transfer from Ng to Be are somewhat larger in NgBeSO4 than those in NgBeCO3 and NgBeO. Electron density and energy decomposition analyses are performed in search of the nature of interaction in the Be-Ng bond in NgBeSO4. The orbital energy term (ΔE(orb)) contributes the maximum (ca. 80-90%) to the total attraction energy. The Ar/Kr/Xe/Rn-Be bonds in NgBeSO4 could be of partial covalent type with a gradual increase in covalency along Ar to Rn.
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Affiliation(s)
- Ranajit Saha
- †Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India
| | - Sudip Pan
- †Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India
| | - 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, Yucatán, México
| | - Pratim K Chattaraj
- †Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India
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26
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Pan S, Mandal S, Chattaraj PK. Cucurbit[6]uril: A Possible Host for Noble Gas Atoms. J Phys Chem B 2015; 119:10962-74. [DOI: 10.1021/acs.jpcb.5b01396] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sudip Pan
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
| | - Subhajit Mandal
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
| | - Pratim K. Chattaraj
- Department of Chemistry and
Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
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27
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Pan S, Saha R, Chattaraj PK. Exploring the nature of silicon-noble gas bonds in H3SiNgNSi and HSiNgNSi compounds (Ng = Xe, Rn). Int J Mol Sci 2015; 16:6402-18. [PMID: 25809612 PMCID: PMC4394539 DOI: 10.3390/ijms16036402] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/11/2015] [Accepted: 03/16/2015] [Indexed: 11/16/2022] Open
Abstract
Ab initio and density functional theory-based computations are performed to investigate the structure and stability of H3SiNgNSi and HSiNgNSi compounds (Ng = Xe, Rn). They are thermochemically unstable with respect to the dissociation channel producing Ng and H3SiNSi or HSiNSi. However, they are kinetically stable with respect to this dissociation channel having activation free energy barriers of 19.3 and 23.3 kcal/mol for H3SiXeNSi and H3SiRnNSi, respectively, and 9.2 and 12.8 kcal/mol for HSiXeNSi and HSiRnNSi, respectively. The rest of the possible dissociation channels are endergonic in nature at room temperature for Rn analogues. However, one three-body dissociation channel for H3SiXeNSi and one two-body and one three-body dissociation channels for HSiXeNSi are slightly exergonic in nature at room temperature. They become endergonic at slightly lower temperature. The nature of bonding between Ng and Si/N is analyzed by natural bond order, electron density and energy decomposition analyses. Natural population analysis indicates that they could be best represented as (H3SiNg)+(NSi)- and (HSiNg)+(NSi)-. Energy decomposition analysis further reveals that the contribution from the orbital term (ΔEorb) is dominant (ca. 67%-75%) towards the total attraction energy associated with the Si-Ng bond, whereas the electrostatic term (ΔEelstat) contributes the maximum (ca. 66%-68%) for the same in the Ng-N bond, implying the covalent nature of the former bond and the ionic nature of the latter.
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Affiliation(s)
- Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India.
| | - Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India.
| | - Pratim K Chattaraj
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India.
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28
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Chakraborty D, Chattaraj PK. In quest of a superhalogen supported covalent bond involving a noble gas atom. J Phys Chem A 2015; 119:3064-74. [PMID: 25733034 DOI: 10.1021/jp513018v] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The possibility of having neutral Xe-bound compounds mediated by some representative transition metal fluorides of general formula MX3 (where M=Ru, Os, Rh, Ir, Pd, Pt, Ag, Au and X=F) has been investigated through density functional theory based calculations. Nature of interaction between MX3 and Xe moieties has been characterized through detailed electron density, charge density and bond energy decomposition analyses. The feasibility of having compounds of general formula XeMX3 at 298 K has been predicted through thermodynamic considerations. The nature of interaction in between Xe and M atoms is partly covalent in nature and the orbital interaction is the dominant contributor toward these interactions as suggested by energy decomposition analysis.
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Affiliation(s)
- Debdutta Chakraborty
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry and Centre for Theoretical Studies Indian Institute of Technology, Kharagpur 721302, West Bengal, India
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30
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Pan S, Gupta A, Mandal S, Moreno D, Merino G, Chattaraj PK. Metastable behavior of noble gas inserted tin and lead fluorides. Phys Chem Chem Phys 2015; 17:972-82. [DOI: 10.1039/c4cp03856h] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The metastable FNgEF and FNgEF3 (E = Sn, Pb; Ng = Kr–Rn) are the first reported neutral compounds possessing Ng–Sn and Ng–Pb covalent bonds.
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Affiliation(s)
- Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
| | - Ashutosh Gupta
- Department of Chemistry
- Udai Pratap Autonomous College
- Varanasi
- India
| | - Subhajit Mandal
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
| | - Diego Moreno
- Departamento de Física Aplicada
- Centro de Investigación y de Estudios Avanzados Unidad Mérida
- Mérida
- México
| | - Gabriel Merino
- Departamento de Física Aplicada
- Centro de Investigación y de Estudios Avanzados Unidad Mérida
- Mérida
- México
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology
- Kharagpur
- India
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31
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Pan S, Saha R, Chattaraj PK. On the stability of noble gas bound 1-tris(pyrazolyl)borate beryllium and magnesium complexes. NEW J CHEM 2015. [DOI: 10.1039/c5nj00983a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1-Tris(pyrazolyl)borate beryllium and magnesium cationic complexes are found to bind Ar–Rn atoms quite effectively.
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Affiliation(s)
- Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- India
| | - Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- India
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- India
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