912338-34-2Relevant academic research and scientific papers
Platinum(II) complexes with 1-cyclohepta-2,4,6-trienyl-diphenylphosphane, Ph2P(C7H7), and alkyn-1-yl ligands
Wrackmeyer, Bernd,Ullmann, Bettina,Kempe, Rhett,Herberhold, Max
, p. 2629 - 2634 (2008/10/09)
[1-Cyclohepta-2,4,6-trienyl-diphenylphosphane]platinum(II) dichloride (4) was prepared by the 1:1 reaction of (cod)PtCl2 (cod = η4-cycloocta-1,5-diene) with the phosphane. The reaction of 4 with di(alkyn-1-yl)dimethylstannanes, Me2Sn(C=C-R)2 [R = H (a), Me (b), Ph (c), SiMe3 (d)], in boiling THF gave selectively in high yield the monoalkynyl complexes [Ph2P(C7H 7)]Pt(Cl)C≡C-R (6b,c,d), in which the alkyn-1-yl group is arranged in cis position with respect to the phosphorus atom, and the C 7H7 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 [Ph 2P(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 the molecular structures of 4 and 7d were determined by X-ray crystallography.
