Macropolyhedral boron-containing cluster chemistry. Aspects of the S2B16H16 system. Preparation, structure, NMR spectroscopy and isomerism

0163513 - UACH-T 20033064 RIV CH eng J - Článek v odborném periodiku
Dosangh, P. K. - Bould, J. - Londesborough, Michael Geoffrey Stephen - Jelínek, Tomáš - Thornton-Pett, M. - Štíbr, Bohumil - Kennedy, J. D.
Macropolyhedral boron-containing cluster chemistry. Aspects of the S2B16H16 system. Preparation, structure, NMR spectroscopy and isomerism.
Journal of Organometallic Chemistry. Roč. 680, 1-2 (2003), s. 312-322. ISSN 0022-328X. E-ISSN 1872-8561
Grant CEP: GA MŠMT LN00A028; GA MŠMT LB98233
Výzkumný záměr: CEZ:AV0Z4032918
Klíčová slova: heteroborane cluster isomerism * marcopolyhedral thiaborane * X-ray structures
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 2.042, rok: 2003

Thermolysis of [arachno-4-SB8H12] (1) in boiling cyclohexane gives two isomers 2 and 3 of 18-vertex [S2B16H16], together with known 12-vertex [closo-1-SB11H11] (4) and known 11-vertex [nido-7-SB10H12] (5). Compounds 2 and 3 are characterised by single-crystal X-ray diffraction analyses and single- and double-resonance B-11- and H-1-NMR spectroscopy. The [n-S2B16H16] isomer 2 takes the form of nido ten-vertex: nido ten-vertex [anti-B18H22] with the 9 and 9' positions occupied by S vertices, whereas the [iso-S2B16H16] isomer 3 takes the form of a nido 11-vertex {SB10} subcluster fused via a common two-boron edge to a nido-type {B-8} subcluster that is additionally linked exo to the {SB10} subcluster by a bridging S atom that is held endo to the {B-8} unit. Isomer 2 is readily deprotonated and its monoanion 6 is characterised by NMR spectroscopy and by a single-crystal X-ray diffraction analysis of its [tmndH](+)[n-S2B16H15] salt 6b; deprotonation has occurred from an open-face B-H-B bridging site.
Trvalý link: http://hdl.handle.net/11104/0060743