Platinum(II) Complexes with 1-Cyclohepta-2,4,6-trienyl-diphenylphosphane, Ph2P(C7H7), and Alkyn-1-yl Ligands
作者:Bernd Wrackmeyer、Bettina Ullmann、Rhett Kempe、Max Herberhold
DOI:10.1002/zaac.200500078
日期:2005.10
the alkyn-1-yl group is arranged in cis position with respect to the phosphorus atom, and the C7H7 ring is η2-coordinated to platinum through the central C=C bond. The same reaction at room temperature afforded, again selectively and in high yield, the dialkynyl complexes [Ph2P(C7H7)]Pt(C≡C-R)2 (7a-d). The new complexes were characterised in solution by 1H, 13C, 29Si, 31P and 195Pt NMR spectroscopy, and
[1-环庚-2,4,6-三烯基-二苯基膦]二氯化铂 (II) (4) 通过 (cod)PtCl2 (cod = η4-cycloocta-1,5-diene) 与磷烷。4 与二(炔-1-基)二甲基锡烷、Me2Sn(C≡CR)2 [R = H (a), Me (b), Ph (c), SiMe3 (d)] 在沸腾的 THF 中反应得到选择性地以高产率获得单炔基配合物 [Ph2P(C7H7)]Pt(Cl)C≡CR (6b,c,d),其中炔-1-基相对于磷原子排列在顺式位置,和C7H7 环通过中心 C=C 键与铂 η2 配位。在室温下的相同反应再次选择性地以高产率提供二炔基配合物 [Ph2P(C7H7)]Pt(C≡CR)2 (7a-d)。新配合物在溶液中通过 1H、13C、29Si、31P 和 195Pt NMR 光谱表征,