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Luaces S, Passarelli V, Artigas MJ, Lahoz FJ, Oro LA, Macías R. Postsynthetic modifications of [2,2,2-(H)(PPh3)2-closo-2,1-RhSB8H8] with Lewis bases: cluster modular tuning. Dalton Trans 2016; 45:8622-36. [PMID: 27142590 DOI: 10.1039/c6dt00856a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It has been demonstrated that the reaction of [2,2,2-(H)(PPh3)2-closo-2,1-RhSB8H8] () with PPh3 affords the boron substituted rhodathiaborane-PPh3 adduct, [6,6-(PPh3)2-9-(PPh3)-arachno-6,5-RhSB8H9] (). Building upon this reaction, we report herein that the 10-vertex hydridorhodathiaborane reacts with the Lewis bases, PCy3, py, 2-Mepy, 2-Etpy, 3-Mepy and 4-Mepy to form the rhodathiaborane-ligand adducts, [6,6-(PPh3)2-9-(L)-arachno-6,5-RhSB8H9], where L = PCy3 (), 2-Mepy (), 2-Etpy (), py (), 3-Mepy () or 4-Mepy (), and [8,9-μ-(H)-9-(PPh3)2-8-(L)-arachno-9,6-RhSB8H8], where L = py (), 3-Mepy () or 4-Mepy (). The selectivity of the reactions depended on the nature of the entering Lewis bases, affording the 6,5-isomers, , , and as single products for PPh3, PCy3, 2-Mepy and 2-Etpy; and mixtures of the 6,5-/9,6-regioisomers, /, / and / for py, 3-Mepy and 4-Mepy, respectively. The molecular structures of both regioisomers were characterized by X-ray diffraction analysis for the 6,5-isomers, and , and for the 9,6-isomers, and . Variable temperature NMR studies of the reaction between and PPh3 or 2-Mepy demonstrated that at low temperatures there is formation of the 9,6-species that subsequently isomerizes to the 6,5-regioisomer, indicating that for the more sterically hindered Lewis bases, PPh3, 2-Mepy and PCy3, the latter isomer is more stable and accessible through an intramolecular {Rh(PPh3)2} vertex flip. The formation of both isomers with py, 3-Mepy and 4-Mepy indicates that the kinetic and thermodynamic energies of the 6,5 and 9,6 rhodathiaborane-ligand adducts are similar for these Lewis bases. Lewis base bonding to exo-polyhedral boron vertices results in a change of the metal coordination from pseudo-octahedral Rh(iii) in to pseudo-square planar Rh(i) in the adducts. The chemistry described here highlights the remarkable structural flexibility of these polyhedral boron-containing compounds, their modular architecture and their easy postsynthetic modification.
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Affiliation(s)
- Susana Luaces
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Vincenzo Passarelli
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain. and Centro Universitario de la Defensa, Ctra. Huesca s/n, ES-50090 Zaragoza, Spain
| | - María José Artigas
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Fernando J Lahoz
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Luis A Oro
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Ramón Macías
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
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Braunschweig H, Hörl C. Unexpected cluster formation upon hydroboration of a neutral diborene with 9-BBN. Chem Commun (Camb) 2014; 50:10983-5. [PMID: 25096570 DOI: 10.1039/c4cc04476b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The reaction of the neutral, base-stabilised diborenes 1a,b with the well-known hydroboration reagent 9-borabicyclo[3.3.1]nonane (9-BBN) is presented. This leads to the formation of a nonclassical structural motif with a B3 core concomitant with the cleavage of a B-C bond. This compound has been characterised in solution and by X-ray crystallography. According to Wade's rules these rare B3 clusters follow the arachno classification (2n + 6 electrons) and represent doubly base-stabilised B3H5 analogues.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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Safa MA, Abo-Amer A, Borecki A, Cooper BFT, Puddephatt RJ. Synthesis and Self-Association of Organoplatinum(IV) Boronic Acids. Organometallics 2012. [DOI: 10.1021/om2009217] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Muhieddine A. Safa
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
| | - Anwar Abo-Amer
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
- Department
of Chemistry, Al al-Bayt University, Al-Mafraq, Jordan
| | - Aneta Borecki
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
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Sahoo S, Reddy KHK, Dhayal RS, Mobin SM, Ramkumar V, Jemmis ED, Ghosh S. Chlorinated Hypoelectronic Dimetallaborane Clusters: Synthesis, Characterization, and Electronic Structures of (η5-C5Me5W)2B5HnClm (n = 7, m = 2 and n = 8, m = 1). Inorg Chem 2009; 48:6509-16. [DOI: 10.1021/ic900467d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Satyanarayan Sahoo
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - K. Hari Krishna Reddy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 022, India
| | - Rajendra S. Dhayal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Shaikh M. Mobin
- National Single Crystal X-ray Diffraction Facility, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - V. Ramkumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - E. D. Jemmis
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 022, India
| | - Sundargopal Ghosh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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Franken A, McGrath TD, Stone FGA. 10-Vertex Manganese−Dicarbollide Complexes from a Monocarbon Precursor. Synthesis and Cluster Vertex Functionalization of [1-OH-2,2,2-(CO)3-closo-2,1,10-MnC2B7H8]−. Organometallics 2008. [DOI: 10.1021/om800730n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Franken
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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