Macropolyhedral boron-containing cluster chemistry. Aspects of the S2B16H16 system. Preparation, structure, NMR spectroscopy and isomerism
摘要:
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. (C) 2003 Elsevier B.V. All rights reserved.
Macropolyhedral boron-containing cluster chemistry. Cluster fusion to give the novel nido–nido eighteen-vertex dithiaoctadecaborane (anti)-[9,9′-S2B16H16]
Macropolyhedral boron-containing cluster chemistry. [PtMe2(PMe2Ph)2] as a cluster metallating agent. Isolation and characterisation of nineteen-vertex [(PMe2Ph)HPt-η4-syn-B18H19(PMe2Ph)] and eighteen-vertex [(PMe2Ph)2PtS2B15H14(NHCOMe]
作者:Pervinder Kaur、Annette Brownless、Sarath D Perera、Paul A Cooke、Tomáš Jelı́nek、John D Kennedy、Bohumil Štı́br、Mark Thornton-Pett
DOI:10.1016/s0022-328x(97)00666-9
日期:1998.4
[PtMe2(PMe2Ph)(2)] reacts quantitatively with [nido-B10H14], [arachno-4-SB8H12] and [nido-7-SB10H12] to give [(PMe2Ph)(2)PtB10H12], [(PMe2Ph)(2)PtSB8H10] and [(PMe2Ph)(2)PtSB10H10]. With [syn-B18H22] it gives nineteen-vertex [(PMe2Ph)HPtn(4)-syn-B18H19(PMe2Ph)](1) and only smaller amounts of [(PMe2Ph)(2)Pt-n(4)-syn-B18H20], whereas with [(anti)-9,9'-S2B16H16] a complex product mixture is generated from which eighteen-vertex [(PMe2Ph)(2)Pts(2)B(15)H(14)(NHCOMe)](1) is isolatable after treatment with MeCN in air. (C) 1998 Elsevier Science S.A. All rights reserved.
Kaur, Pervinder; Kennedy, John D.; Thornton-Pett, Mark, Journal of the Chemical Society, Dalton Transactions, 1996, p. 1775 - 1778
作者:Kaur, Pervinder、Kennedy, John D.、Thornton-Pett, Mark、Jelinek, Tomas、Stibr, Bohumil