51
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Poater J, Solà M, Viñas C, Teixidor F. Hückel's Rule of Aromaticity Categorizes Aromatic
closo
Boron Hydride Clusters. Chemistry 2016; 22:7437-43. [DOI: 10.1002/chem.201600510] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Jordi Poater
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional (IQCTCUB) Universitat de Barcelona Martí i Franquès 1-11 08028 Barcelona, Catalonia Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) Pg. Lluís Companys 23 08010 Barcelona, Catalonia Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química Universitat de Girona 17071 Girona, Catalonia Spain
| | - Clara Viñas
- Institut de Ciències dels Materials de Barcelona CSIC, Campus UAB 08193 Bellaterra Spain
| | - Francesc Teixidor
- Institut de Ciències dels Materials de Barcelona CSIC, Campus UAB 08193 Bellaterra Spain
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52
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Fanfrlík J, Hnyk D. Chalcogens act as inner and outer heteroatoms in borane cages with possible consequences for σ-hole interactions. CrystEngComm 2016. [DOI: 10.1039/c6ce01861k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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53
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54
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Zhang J, Lin Z, Xie Z. DFT Studies on Structures, Stabilities, and Electron Affinities of closo-Supercarboranes C2Bn–2Hn (n = 13–20). Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00796] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiji Zhang
- Department of Chemistry and State Key Laboratory
of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory
of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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55
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Otsuka M, Takita R, Kanazawa J, Miyamoto K, Muranaka A, Uchiyama M. Conjugation between σ- and π-Aromaticity in 1-C-Arylated Monocarba-closo-dodecaborate Anions. J Am Chem Soc 2015; 137:15082-5. [DOI: 10.1021/jacs.5b10321] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Mai Otsuka
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryo Takita
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Junichiro Kanazawa
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kazunori Miyamoto
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Atsuya Muranaka
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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56
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Lo R, Fanfrlík J, Lepšík M, Hobza P. The properties of substituted 3D-aromatic neutral carboranes: the potential for σ-hole bonding. Phys Chem Chem Phys 2015. [PMID: 26213995 DOI: 10.1039/c5cp03617h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The calculated properties of substituted carboranes such as dipole moment, polarisability, the magnitude of the σ-hole and the desolvation free energy are compared with these properties in comparable aromatic and cyclic aliphatic organic compounds. Dispersion and charge transfer energies are similar. However, the predicted strength of the halogen bonds with the same electron donor (based on the magnitude of the σ-hole) is larger for neutral C-vertex halogen-substituted carboranes than for their organic counterparts. Furthermore, the desolvation penalties of substituted carboranes are smaller than those of the corresponding organic compounds, which should further strengthen the halogen bonds of the former in the solvent. It is predicted that substituted carboranes have the potential to form stronger halogen bonds than comparable aromatic hydrocarbons, which will be even more pronounced in the medium. This theoretical study thus lays ground for the rational engineering of halogen bonding in inorganic crystals as well as in biomolecular complexes.
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Affiliation(s)
- Rabindranath Lo
- Institute of Organic Chemistry and Biochemistry (IOCB) and Gilead Sciences and IOCB Research Center, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
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57
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Hang TD, Hung HM, Nguyen HT, Nguyen MT. Structures, Thermochemical Properties, and Bonding of Mixed Alkaline-Earth-Metal Silicon Trimers Si3M+/0/– with M = Be, Mg, Ca. J Phys Chem A 2015; 119:6493-503. [DOI: 10.1021/acs.jpca.5b02492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tran Dieu Hang
- Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium
| | - Huynh Minh Hung
- Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium
| | - Huyen Thi Nguyen
- Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium
| | - Minh Tho Nguyen
- Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium
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58
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Mader P, Pecina A, Cígler P, Lepšík M, Šícha V, Hobza P, Grüner B, Fanfrlík J, Brynda J, Řezáčová P. Carborane-based carbonic anhydrase inhibitors: insight into CAII/CAIX specificity from a high-resolution crystal structure, modeling, and quantum chemical calculations. BIOMED RESEARCH INTERNATIONAL 2014; 2014:389869. [PMID: 25309911 PMCID: PMC4189773 DOI: 10.1155/2014/389869] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/08/2014] [Indexed: 12/03/2022]
Abstract
Carborane-based compounds are promising lead structures for development of inhibitors of carbonic anhydrases (CAs). Here, we report structural and computational analysis applicable to structure-based design of carborane compounds with selectivity toward the cancer-specific CAIX isoenzyme. We determined the crystal structure of CAII in complex with 1-methylenesulfamide-1,2-dicarba-closo-dodecaborane at 1.0 Å resolution and used this structure to model the 1-methylenesulfamide-1,2-dicarba-closo-dodecaborane interactions with CAIX. A virtual glycine scan revealed the contributions of individual residues to the energy of binding of 1-methylenesulfamide-1,2-dicarba-closo-dodecaborane to CAII and CAIX, respectively.
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Affiliation(s)
- Pavel Mader
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Vídeňská 1083, 140 00 Prague 4, Czech Republic
- Structural Genomics Consortium, University of Toronto, Toronto, ON, Canada M5G 1L7
| | - Adam Pecina
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
| | - Petr Cígler
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
| | - Martin Lepšík
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
| | - Václav Šícha
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Hlavní 1001, 250 68 Řež near Prague, Czech Republic
| | - Pavel Hobza
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
- Regional Center of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University, 77146 Olomouc, Czech Republic
| | - Bohumír Grüner
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Hlavní 1001, 250 68 Řež near Prague, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Vídeňská 1083, 140 00 Prague 4, Czech Republic
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
| | - Pavlína Řezáčová
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Vídeňská 1083, 140 00 Prague 4, Czech Republic
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences and IOCB Research Center, Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
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59
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Poater J, Solà M, Viñas C, Teixidor F. π Aromaticity and Three-Dimensional Aromaticity: Two sides of the Same Coin? Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407359] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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60
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Poater J, Solà M, Viñas C, Teixidor F. π aromaticity and three-dimensional aromaticity: two sides of the same coin? Angew Chem Int Ed Engl 2014; 53:12191-5. [PMID: 25223923 DOI: 10.1002/anie.201407359] [Citation(s) in RCA: 219] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/21/2014] [Indexed: 11/09/2022]
Abstract
A bridge between classical organic polycyclic aromatic hydrocarbons (PAH) and closo borohydride clusters is established by showing that they share a common origin regulated by the number of valence electrons in an electronic confined space. Application of the proposed electronic confined space analogy (ECSA) method to archetypal PAHs leads to the conclusion that the 4n+2 Wade-Mingos rule for three-dimensional closo boranes is equivalent to the (4n+2)π Hückel rule for two-dimensional PAHs. More importantly, use of ECSA allows design of new interesting fused closo boranes which can be a source of inspiration for synthetic chemists.
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Affiliation(s)
- Jordi Poater
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, Vrije Universiteit, De Boelelaan 1083, 1081HV Amsterdam (The Netherlands)
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61
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A topological pattern for understanding the structures of boranes and borane analog compounds. Struct Chem 2014. [DOI: 10.1007/s11224-014-0488-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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62
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Hailmann M, Konieczka SZ, Himmelspach A, Löblein J, Reiss GJ, Finze M. Carba-closo-dodecaborate anions with two functional groups: [1-R-12-HC≡C-closo-1-CB₁₁H₁₀]⁻ (R = CN, NC, CO₂H, C(O)NH₂, NHC(O)H). Inorg Chem 2014; 53:9385-99. [PMID: 25140733 DOI: 10.1021/ic501526g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Disubstituted carba-closo-dodecaborate anions with one functional group bonded to the cluster carbon atom and one ethynyl group bonded to the antipodal boron atom were synthesized from easily accessible {closo-1-CB11} clusters. [Et4N][1-NC-12-HC≡C-closo-1-CB11H10] ([Et4N]4b) was prepared starting from Cs[12-Et3SiC≡C-closo-1-CB11H11] (Cs1c) via salts of the anions [1-HO(O)C-12-HC≡C-closo-1-CB11H10](-) (2b) and [1-H2N(O)C-12-HC≡C-closo-1-CB11H10](-) (3b). In a similar reaction sequence [Et4N][1-CN-12-HC≡C-closo-1-CB11H10] ([Et4N]7b) was obtained from Cs[1-H2N-12-HC≡C-closo-1-CB11H10] (Cs5b) by formamidation to yield [Et4N][1-H(O)CHN-12-HC≡C-closo-1-CB11H10] ([Et4N]6b) and successive dehydration. In addition, the synthesis of the isonitrile [Et4N][1-CN-closo-1-CB11H11] ([Et4N]7a) is presented. The {closo-1-CB11} derivatives were characterized by multinuclear NMR as well as vibrational spectroscopy, mass spectrometry, and elemental analysis. The crystal structures of [Et4N][1-HO(O)C-12-HC≡C-closo-1-CB11H10] ([Et4N]2b), [Et4N][1-H2N(O)C-12-HC≡C-closo-1-CB11H10] ([Et4N]3b), [Et4N][1-NC-12-HC≡C-closo-1-CB11H10] ([Et4N]4b), [Et4N][1-H(O)CHN-12-HC≡C-closo-1-CB11H10] ([Et4N]6b), [Et4N][1-CN-12-HC≡C-closo-1-CB11H10] ([Et4N]7b), and K[1-H(O)CHN-closo-1-CB11H11] ([Et4N]6a) were determined. The transmission of electronic effects through the carba-closo-dodecaboron cage was studied based on (13)C NMR spectroscopic data, by results derived from density functional theory calculations, and by a comparison to the data of related benzene and bicyclo[2.2.2]octane derivatives.
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Affiliation(s)
- Michael Hailmann
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
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63
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64
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Li F, Jiang DE, Chen Z. Computational quest for spherical C12B68 fullerenes with “magic” π-electrons and quasi-planar tetra-coordinated carbon. J Mol Model 2014; 20:2085. [DOI: 10.1007/s00894-014-2085-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 11/03/2013] [Indexed: 10/25/2022]
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65
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Douvris C, Michl J. Update 1 of:Chemistry of the Carba-closo-dodecaborate(−) Anion, CB11H12–. Chem Rev 2014; 113:PR179-233. [PMID: 23944158 DOI: 10.1021/cr400059k] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christos Douvris
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, 16610 Prague, Czech Republic
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, 16610 Prague, Czech Republic
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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66
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Lu Y, Lent CS. Counterion-free molecular quantum-dot cellular automata using mixed valence zwitterions – A double-dot derivative of the [closo-1-CB9H10]− cluster. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.07.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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67
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TANG YUPENG, LI NAN. STRUCTURE AND STABILITY OF $CLOSO-B_{n}H_{n-1}N_{2}^{-} (n=5-12)$. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
[Formula: see text], framework-isoelectronic to [Formula: see text], have been investigated at the B3LYP/6-311+G** level of theory. The most stable positional isomers of individual [Formula: see text] are similar to those of [Formula: see text] and [Formula: see text] in framework configuration. The energy analysis reveals that the cage [Formula: see text] with the icosahedron framework, [Formula: see text] with the octahedron framework and [Formula: see text] with the bicapped square antiprism framework are, in order, the most stable in the [Formula: see text] system. Furthermore, three-dimensional aromaticity of all [Formula: see text] is characterized. The most stable cages, [Formula: see text], [Formula: see text] and [Formula: see text], also have relatively large aromaticity. All the predicted N–N stretching frequencies (2127–2303 cm−1) of the most stable positional isomers in the [Formula: see text] system are lower than the computational N–N stretching frequency (2445 cm−1) of free N2 at the same level, which results from the σ donation of N2 to B frameworks. The stretching frequencies of N–N in the [Formula: see text] cages increase with the decrease of N–N distances or the increase of B–N distance. In addition, B n−1 H n−1 fragment has larger affinity for group CH than that for group BNN, namely, it favors to form the [Formula: see text] rather than the [Formula: see text].
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Affiliation(s)
- YUPENG TANG
- School of Mechatronical Engineering, State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - NAN LI
- School of Mechatronical Engineering, State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
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68
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Gona KB, Gómez-Vallejo V, Llop J. Synthesis of m-carboranyl amides via palladium-catalyzed carbonylation. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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69
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Muñoz-Castro A. On the magnetic behavior of spherical aromatic compounds. Insights from the closo-[B12H12]2− cluster through chemical shift tensor maps. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.10.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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70
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Boeré RT, Bolli C, Finze M, Himmelspach A, Knapp C, Roemmele TL. Quantum-Chemical and Electrochemical Investigation of the Electrochemical Windows of Halogenated Carborate Anions. Chemistry 2012; 19:1784-95. [DOI: 10.1002/chem.201202475] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 10/05/2012] [Indexed: 11/07/2022]
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Abstract
INTRODUCTION Boron lies on the borderline between metals and non-metals in the periodic table. As such, it possesses peculiarities which render it suitable for a variety of applications in chemistry, technology and medicine. However, boron's peculiarities have been exploited only partially so far. AREAS COVERED In this review, the authors highlight selected areas of research which have witnessed new uses of boron compounds in recent times. The examples reported illustrate how difficulties in the synthesis and physicochemical characterization of boronated molecules, encountered in past years, can be overcome with positive effects in different fields. EXPERT OPINION Many potentialities of boron-based systems reside in the peculiar properties of both boron atoms (the ability to replace carbon atoms, electron deficiency) and of boronated compounds (hydrophobicity, lipophilicity, versatile stereochemistry). Taken in conjunction, these properties can provide innovative drugs. The authors highlight the need to further investigate the assembly of boronated compounds, in terms of drug design, since the mechanisms required to obtain supramolecular structures may be unconventional compared with the more standard molecules used. Furthermore, the authors propose that computational methods are a valuable tool for assessing the role of multicenter, quasi-aromatic bonds and its peculiar geometries.
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Affiliation(s)
- Laura Ciani
- University of Florence, Department of Chemistry & CSGI, Sesto Fiorentino, Italy.
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72
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Scholz M, Blobaum AL, Marnett LJ, Hey-Hawkins E. Ortho-carbaborane derivatives of indomethacin as cyclooxygenase (COX)-2 selective inhibitors. Bioorg Med Chem 2012; 20:4830-7. [PMID: 22748709 DOI: 10.1016/j.bmc.2012.05.063] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 05/15/2012] [Accepted: 05/25/2012] [Indexed: 12/31/2022]
Abstract
A series of novel indomethacin analogues with carbaboranes as three-dimensional substitutes for the chlorophenyl ring have been prepared. Their cyclooxygenase (COX) inhibition and enzyme selectivity has been tested and compared to the corresponding adamantyl analogues. Surprisingly, only the ortho-carbaborane derivatives were active compounds. Preliminary biological studies gave an interesting insight into the validity of employing carbaboranes as pharmacophores.
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Affiliation(s)
- Matthias Scholz
- Institut für Anorganische Chemie der Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
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73
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Pecyna JG, Ringstrand B, Kaszyński P. Transmission of Electronic Effects through the {closo-1-CB9} and {closo-1-CB11} Cages: Apparent Dissociation Constants for Series of [closo-1-CB9H8-1-COOH-10-X] and [closo-1-CB11H10-1-COOH-12-X] Acids. Inorg Chem 2012; 51:5353-9. [DOI: 10.1021/ic300298e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jacek G. Pecyna
- Organic Materials
Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee
37235,
United States
| | - Bryan Ringstrand
- Organic Materials
Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee
37235,
United States
| | - Piotr Kaszyński
- Organic Materials
Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee
37235,
United States
- Faculty of Chemistry, University of Lódź, Tamka 12, 91403 Lódź,
Poland
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74
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Wahab A, Stepp B, Douvris C, Valášek M, Štursa J, Klı́ma J, Piqueras MC, Crespo R, Ludvı́k J, Michl J. Measured and Calculated Oxidation Potentials of 1-X-12-Y-CB11Me10– Anions. Inorg Chem 2012; 51:5128-37. [DOI: 10.1021/ic2026939] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abdul Wahab
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
3, 18223 Prague 8, Czech Republic
- Institute of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nám. 2, 16610 Prague 6, Czech Republic
| | - Brian Stepp
- Institute of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nám. 2, 16610 Prague 6, Czech Republic
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215,
United States
| | - Christos Douvris
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215,
United States
| | - Michal Valášek
- Institute of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nám. 2, 16610 Prague 6, Czech Republic
| | - Jan Štursa
- Institute of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nám. 2, 16610 Prague 6, Czech Republic
| | - Jiřı́ Klı́ma
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
3, 18223 Prague 8, Czech Republic
| | - Mari-Carmen Piqueras
- Departament de Quı́mica Fı́sica, Universitat de València, Dr.
Moliner 50, E-46100 Burjassot, Spain
| | - Raül Crespo
- Departament de Quı́mica Fı́sica, Universitat de València, Dr.
Moliner 50, E-46100 Burjassot, Spain
| | - Jiřı́ Ludvı́k
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
3, 18223 Prague 8, Czech Republic
| | - Josef Michl
- Institute of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nám. 2, 16610 Prague 6, Czech Republic
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215,
United States
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75
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Lupan A, Bruce King R. Kinetic versus thermodynamic isomers of the deltahedral dicobaltadicarbaboranes having nine to 12 vertices. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.11.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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76
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QIN XIAOFANG, WU HAISHUN, JIAO HAIJUN. STRUCTURE AND STABILITY OF HYDROGEN POOR CLOSO-${\rm B}_{n}{\rm H}_{n-x}^{-/0/+}$ (n = 5 - 12). JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633608003940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Structures and stabilities of hydrogen poor closo-[Formula: see text], closo- B n H n-2, and closo-[Formula: see text] (n = 5 - 12) have been investigated at the B3LYP/6-311+G** density functional level of theory. It is found that [Formula: see text], B 5 H 3, [Formula: see text], and [Formula: see text] have open instead of the expected closo structures, and the other isomers have the same structural pattern as closo-[Formula: see text]. Energetic analysis identifies closo-[Formula: see text] (n = 7, 9), closo- B n H n-2 (n = 7, 11), and closo-[Formula: see text] (n = 6, 8, 10) as the most stable clusters. The CO affinities of the most stable closo- B n H n-1 CO -, closo- B n H n-2( CO )2, and closo-[Formula: see text] (n = 5 - 12) have been computed.
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Affiliation(s)
- XIAO-FANG QIN
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - HAI-SHUN WU
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - HAIJUN JIAO
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
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77
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Scholz M, Hey-Hawkins E. Carbaboranes as pharmacophores: properties, synthesis, and application strategies. Chem Rev 2011; 111:7035-62. [PMID: 21780840 DOI: 10.1021/cr200038x] [Citation(s) in RCA: 582] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Matthias Scholz
- Institut für Anorganische Chemie der Universität Leipzig, Germany
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78
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Miao C, Li S. B n (BO) n 2− , CB n−1(BO) n − , and C2B n−2(BO) n (n = 5−12): Cage-like boron oxide clusters analogous to closo-B n H n 2− , CB n−1H n − , and C2B n−2H n. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4258-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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79
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Dash BP, Satapathy R, Gaillard ER, Norton KM, Maguire JA, Chug N, Hosmane NS. Enhanced π-Conjugation and Emission via Icosahedral Carboranes: Synthetic and Spectroscopic Investigation. Inorg Chem 2011; 50:5485-93. [DOI: 10.1021/ic200010q] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Barada Prasanna Dash
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
| | - Rashmirekha Satapathy
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
| | - Elizabeth R. Gaillard
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
| | - Kathleen M. Norton
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
| | - John A. Maguire
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275-0314, United States
| | - Neha Chug
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
| | - Narayan S. Hosmane
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115-2862, United States
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80
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Scholz M, Kaluđerović GN, Kommera H, Paschke R, Will J, Sheldrick WS, Hey-Hawkins E. Carbaboranes as pharmacophores: Similarities and differences between aspirin and asborin. Eur J Med Chem 2011; 46:1131-9. [DOI: 10.1016/j.ejmech.2011.01.030] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 01/05/2011] [Accepted: 01/17/2011] [Indexed: 11/25/2022]
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81
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Samdal S, Møllendal H, Hnyk D, Holub J. Microwave Spectra and Structures of 1,2-(ortho)- and 1,7-(meta)-Carborane, C2B10H12. J Phys Chem A 2011; 115:3380-5. [DOI: 10.1021/jp200820d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Svein Samdal
- Centre for Theoretical and Computational Chemistry (CTCC), Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, NO-0315 Oslo, Norway
| | - Harald Møllendal
- Centre for Theoretical and Computational Chemistry (CTCC), Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, NO-0315 Oslo, Norway
| | - Drahomir Hnyk
- Institute of Inorganic Chemistry of the ASCR, v.v.i., CZ-250 68 Husinec-Řež, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry of the ASCR, v.v.i., CZ-250 68 Husinec-Řež, Czech Republic
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82
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Shainyan BA. Electron-counting rules, three-dimensional aromaticity, and the boundaries of the Periodic Table. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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83
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Dash BP, Satapathy R, Maguire JA, Hosmane NS. Polyhedral boron clusters in materials science. NEW J CHEM 2011. [DOI: 10.1039/c1nj20228f] [Citation(s) in RCA: 148] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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84
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Hnyk D, Wann DA, Holub J, Samdal S, Rankin DWH. Why is the antipodal effect in closo-1-SB9H9 so large? A possible explanation based on the geometry from the concerted use of gas electron diffraction and computational methods. Dalton Trans 2011; 40:5734-7. [DOI: 10.1039/c1dt10053j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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85
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Hnyk D, Holub J, Jelínek T, Macháček J, Londesborough MGS. Revisiting B20H16 by means of a joint computational/experimental NMR approach. ACTA ACUST UNITED AC 2010. [DOI: 10.1135/cccc2010073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A new synthesis of the fused macropolyhedral boron cluster B20H16 is described and its molecular structure in solution discussed, based on multi-nuclear NMR spectra, including COSY measurements, in relation to its previously elucidated solid-state structure. To verify the conclusions from the NMR study, experimentally determined chemical shifts are compared with calculated values at the GIAO-B3LYP level with a TZP basis set by Huzinaga. There is a very good agreement between the experimental and computed δ(11B) values, suggesting that the MP2/6-31G* internal coordinates are a reasonable representation of the molecular geometry of this twenty-vertex cluster in solution that is essentially the same as its solid-state structure. A computational analysis of the FMO orbitals of B20H16, in particular of the LUMO, reveals that the four naked boron atoms, common for two shared icosahedral subclusters, are the reactive sites of this D2d-symmetrical molecule.
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86
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Hnyk D, Všetečka V, Drož L. Charge distribution within hypercarbon-halogenated 1-Ph-2-X-1,2-dicarba-closo-dodecaboranes, (X=F, Cl, Br, I): A dipole moment and computational study. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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87
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Ringstrand B, Kaszynski P, Young VG, Janousek Z. Anionic amino acid [closo-1-CB9H8-1-COO-10-NH3]- and dinitrogen acid [closo-1-CB9H8-1-COOH-10-N2] as key precursors to advanced materials: synthesis and reactivity. Inorg Chem 2010; 49:1166-79. [PMID: 20043626 DOI: 10.1021/ic9021323] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Amino acid [closo-1-CB(9)H(8)-1-COO-10-NH(3)](-) (4) was prepared by amination of iodo acid [closo-1-CB(9)H(8)-1-COOH-10-I](-) (1) with LiHMDS in a practical and reproducible manner. The apparent dissociation constants, pK(2) = 5.6 and pK(1) > 11, were measured for 4[NMe(4)] in 50% aq. EtOH. Diazotization of 4 with NO(+)PF(6)(-) under mildly basic conditions afforded stable dinitrogen acid [closo-1-CB(9)H(8)-1-COOH-10-N(2)] (5). Activation parameters (DeltaH(++) = 33.9 +/- 1.4 kcal mol(-1) and DeltaS(++) = 10 +/- 3.5 cal mol(-1) K(-1)) for thermolysis of its methyl ester [closo-1-CB(9)H(8)-1-COOMe-10-N(2)] (11) in PhCN were established, and the heterolysis of the B-N bond is believed to be the rate-determining step. Electrochemical analysis showed a partially reversible reduction process for 11 (E(1/2)(red) = -1.03 V) and 5(-) (E(1/2)(red) = -1.21 V), which are more cathodic than reduction of [closo-1-CB(9)H(9)-1-N(2)] (17). The dinitrogen acid 5 was reacted with pyridine and N,N-dimethylthioformamide, to form pyridine acid 6 and protected mercapto acid 7, respectively, through a boronium ylide intermediate 18. Compound 7 was converted to sulfonium acid 8. The molecular and crystal structures for 5 [C(2)H(9)B(9)N(2)O(2) monoclinic, P2(1)/n, a = 7.022(2) A, b = 11.389(4) A, c = 12.815(4) A, beta = 96.212(5) degrees ; V = 1018.8(6) A(3), Z = 4,], 6 [C(7)H(14)B(9)NO(2), monoclinic, P2(1)/n, a = 14.275(4) A, b = 12.184(3) A, c = 30.538(8) A, beta = 95.377(4) degrees ; V = 5288(3) A(3), Z = 16], and 8 [C(7)H(19)B(9)O(2)S, monoclinic, P2(1)/c, a = 15.988(5) A, b = 19.377(6) A, c = 9.655(3) A, beta = 98.348(5) degrees; V = 2959.4(16) A(3), Z = 8] were determined by X-ray crystallography and compared with results of density functional theory (DFT) and MP2 calculations. Electronic structures of 5, 6, and related species were elucidated with electronic spectroscopy and assessed computationally at the B3LYP/6-31G(d,p), MP2/6-31G(d,p), and ZINDO//MP2 levels of theory.
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Affiliation(s)
- Bryan Ringstrand
- Organic Materials Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
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88
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Gu W, McCulloch BJ, Reibenspies JH, Ozerov OV. Improved methods for the halogenation of the [HCB11H11]− anion. Chem Commun (Camb) 2010; 46:2820-2. [DOI: 10.1039/c001555e] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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89
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Finze M, Sprenger J. Anionic Gold(I) Complexes-Twelve- and Ten-Vertex Monocarba-closo-borate Anions with Carbon-Gold σ Bonds. Chemistry 2009; 15:9918-27. [DOI: 10.1002/chem.200901130] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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90
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Dudenkov IV, Solntsev KA. Theoretical prediction of the new high-density lithium boride LiB11 with polymorphism and pseudoplasticity. RUSS J INORG CHEM+ 2009. [DOI: 10.1134/s0036023609080142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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91
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An overview of the electronic structure in trigonal bipyramidal clusters of main elements or mixed with transition metals. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0563-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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92
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Yu HL, Sang RL, Wu YY. Structure and Aromaticity of B6H5+ Cation: A Novel Borhydride System Containing Planar Pentacoordinated Boron. J Phys Chem A 2009; 113:3382-6. [DOI: 10.1021/jp809599z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hong-Lang Yu
- Department of Chemistry, Hanshan Normal University, Chaozhou,Guangdong, 521041, Poeple’s Republic of China, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, People’s Republic of China
| | - Rui-Li Sang
- Department of Chemistry, Hanshan Normal University, Chaozhou,Guangdong, 521041, Poeple’s Republic of China, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, People’s Republic of China
| | - Yun-Ying Wu
- Department of Chemistry, Hanshan Normal University, Chaozhou,Guangdong, 521041, Poeple’s Republic of China, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, People’s Republic of China
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93
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Zdetsis AD. Success and pitfalls of the Sin−2C2H2–C2Bn−2Hn isolobal analogy: Depth and breadth of the boron connection. J Chem Phys 2009; 130:064303. [PMID: 19222274 DOI: 10.1063/1.3071260] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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94
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Lepšík M, Srnec M, Hnyk D, Grüner B, Plešek J, Havlas Z, Rulíšek L. exo-Substituent effects in halogenated icosahedral (B12H122–) and octahedral (B6H62–) closo-borane skeletons: chemical reactivity studied by experimental and quantum chemical methods. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2008189] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The exo-substituent effects in halogenated icosahedral B12H122– (B12) and octahedral B6H62– (B6) closo-borane skeletons were studied both experimentally and theoretically. Firstly, the equilibrium geometries of exo-substituted B12 and B6 clusters were obtained using quantum chemical calculations at the MP2/def2-SVP level. A comparison with the available X-ray crystallographic data revealed a very good agreement between the theoretical and experimental values. Secondly, other descriptors of the molecular structure of these borane compounds – 11B NMR chemical shifts – were experimentally determined and compared with the calculated values obtained by the ab initio/GIAO approach at the MP2/def2-TZVP level. It was shown that the calculated data reproduced the experiment very closely. Thirdly, we investigated experimentally the halogenation reactions of B12 and attempted to explain the observed ratios between the two obtained disubstituted products (meta/ortho ~ 4:1) by calculating their thermodynamic stabilities using the DFT/B3LYP method. These calculations showed the enhanced stability of the meta disubstituted B12 but did not explain why the para product had not been observed in the experiment. We thus turned our attention to the kinetic aspects of exo-substitution reactions by exploring the possible reaction pathways and transition states. In spite of the complexity of the plausible reaction mechanisms, reasonable agreement was obtained between the calculated activation barriers and the experimental observations concerning the halogenation reactions of the B6 and B12 molecules. It also allowed to exclude from considerations certain reaction pathways leading to the mono- and dihalogenated B12 and B6 species.
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95
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Ringstrand B, Monobe H, Kaszynski P. Anion-driven mesogenicity: ionic liquid crystals based on the [closo-1-CB9H10]− cluster. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b905457j] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Hnyk D, Rankin DWH. Stereochemistry of free boranes and heteroboranes from electron scattering and model chemistries. Dalton Trans 2009:585-99. [DOI: 10.1039/b806774k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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97
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Wang Y, Huang Y, Yin B, Yang B, Liu R. Octacoordinate Carbons Encaged Inside Carborane Clusters: A Density Functional Theory Investigation. J Phys Chem A 2008; 112:7643-51. [DOI: 10.1021/jp801332b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Wang
- Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Department of Chemistry, Beijing Normal University, 100875 Beijing, China
| | - Yuanhe Huang
- Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Department of Chemistry, Beijing Normal University, 100875 Beijing, China
| | - Bing Yin
- Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Department of Chemistry, Beijing Normal University, 100875 Beijing, China
| | - Baohua Yang
- Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Department of Chemistry, Beijing Normal University, 100875 Beijing, China
| | - Ruozhuang Liu
- Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Department of Chemistry, Beijing Normal University, 100875 Beijing, China
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98
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Gribanova TN, Minyaev RM, Minkin VI. Theoretical design of planar systems with hypercoordinate p elements of the second period in a nonmetallic environment. RUSS J GEN CHEM+ 2008. [DOI: 10.1134/s107036320804035x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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99
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Satpati P. Structure and bonding of MCB5H7 and its sandwiched dimer CB5H6M–MCB5H6 (M=Si, Ge, Sn): Isomer stability and preference for slip distorted structure. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2007.12.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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100
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Hnyk D, Wann DA, Holub J, Bühl M, Robertson HE, Rankin DWH. The gas-phase structure of 1-selena-closo-dodecaborane(11), 1-SeB11H11, determined by the concerted use of electron diffraction and computational methods. Dalton Trans 2008:96-100. [DOI: 10.1039/b714457a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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