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de Azevedo Santos L, Trujillo-González DE, Jiménez-Halla JOC, Bickelhaupt FM, Solà M. Stabilization of Diborynes versus Destabilization of Diborenes by Coordination of Lewis Bases: Unravelling the Dichotomy. Chemistry 2024; 30:e202303185. [PMID: 37870211 DOI: 10.1002/chem.202303185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 10/24/2023]
Abstract
We have quantum chemically investigated the boron-boron bonds in B2 , diborynes B2 L2 , and diborenes B2 H2 L2 (L=none, OH2 , NH3 ) using dispersion-corrected relativistic density functional theory at ZORA-BLYP-D3(BJ)/TZ2P. B2 has effectively a single B-B bond provided by two half π bonds, whereas B2 H2 has effectively a double B=B bond provided by two half π bonds and one σ 2p-2p bond. This different electronic structure causes B2 and B2 H2 to react differently to the addition of ligands. Thus, in B2 L2 , electron-donating ligands shorten and strengthen the boron-boron bond whereas, in B2 H2 L2 , they lengthen and weaken the boron-boron bond. The aforementioned variations in boron-boron bond length and strength become more pronounced as the Lewis basicity of the ligands L increases.
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Affiliation(s)
- Lucas de Azevedo Santos
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Daniel E Trujillo-González
- Departamento de Química, División de Ciencias Naturales y Exactas, Unversidad de Guanajuato, Noria Alta S/N Col. Noria Alta, Guanajuato, C.P. 36050, Gto., Mexico
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
| | - J Oscar C Jiménez-Halla
- Departamento de Química, División de Ciencias Naturales y Exactas, Unversidad de Guanajuato, Noria Alta S/N Col. Noria Alta, Guanajuato, C.P. 36050, Gto., Mexico
| | - F Matthias Bickelhaupt
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Department of Chemical Sciences, University of Johannesburg Auckland Park, Johannesburg, 2006, South Africa
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, 17003, Girona, Catalonia, Spain
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Schleier D, Humeniuk A, Reusch E, Holzmeier F, Nunez-Reyes D, Alcaraz C, Garcia GA, Loison JC, Fischer I, Mitric R. Diborene: Generation and Photoelectron Spectroscopy of an Inorganic Biradical. J Phys Chem Lett 2018; 9:5921-5925. [PMID: 30234995 DOI: 10.1021/acs.jpclett.8b02338] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Diborenes, R-BB-R', are of current interest in inorganic chemistry because they offer the opportunity to tune the properties of a biradical by modifying the substituents of the diborene parent, HBBH. Here we synthesize the elusive diborene by H atom abstraction from diborane, B2H6, using fluorine atoms and report a vibrationally resolved photoelectron spectrum of the HBBH biradical. The spectrum is interpreted by comparison with high-level ab initio computations, taking into account the Renner-Teller splitting in the X+ 2Π ionic ground state, which show an excellent agreement with the experimental spectrum. An adiabatic ionization energy of 9.080 ± 0.015 eV was determined, and a vibrational progression in the boron-boron stretching vibration of 0.14 eV is visible. This is due to the reduction of bond order upon ionization, accompanied by an increase of the computed boron-boron bond length, RBB, from 1.514 to 1.606 Å.
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Affiliation(s)
- Domenik Schleier
- Institute of Physical and Theoretical Chemistry , University of Würzburg , Am Hubland, D-97074 Würzburg , Germany
| | - Alexander Humeniuk
- Institute of Physical and Theoretical Chemistry , University of Würzburg , Am Hubland, D-97074 Würzburg , Germany
| | - Engelbert Reusch
- Institute of Physical and Theoretical Chemistry , University of Würzburg , Am Hubland, D-97074 Würzburg , Germany
| | - Fabian Holzmeier
- Institut des Sciences Moléculaires d'Orsay, CNRS, Bât. 520 Université Paris-Sud and Paris-Saclay , F-91405 Orsay Cedex , France
| | - Dianailys Nunez-Reyes
- ISM-CNRS, Université de Bordeaux , 351 cours de la Libération , F-33405 Talence , France
| | - Christian Alcaraz
- LCP, UMR 800, CNRS-Univ. Paris-Sud and Paris Saclay, Bât. 350, Centre Universitaire Paris-Sud , F-91405 Orsay Cedex , France
| | - Gustavo A Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers , St Aubin, B.P. 48 , F-91192 Gif sur Yvette , France
| | - Jean-Christophe Loison
- ISM-CNRS, Université de Bordeaux , 351 cours de la Libération , F-33405 Talence , France
| | - Ingo Fischer
- Institute of Physical and Theoretical Chemistry , University of Würzburg , Am Hubland, D-97074 Würzburg , Germany
| | - Roland Mitric
- Institute of Physical and Theoretical Chemistry , University of Würzburg , Am Hubland, D-97074 Würzburg , Germany
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Loukhovitski BI, Torokhov SA, Loukhovitskaya EE, Sharipov AS. DFT study of small aluminum and boron hydrides: isomeric composition and physical properties. Struct Chem 2018. [DOI: 10.1007/s11224-017-1000-5 https:/doi.org/10.1007/s11224-017-1000-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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