202113-87-9Relevant academic research and scientific papers
Generation of (η2-benzyne)bis(triphenylphosphine)platinum(0): Orthometallation of the Pt(PPh3)2 complexes of benzyne (C6H4) and cyclohexyne (C6H8)
Bennett, Martin A.,Dirnberger, Thomas,Hockless, David C. R.,Wenger, Eric,Willis, Anthony C.
, p. 271 - 277 (2007/10/03)
The benzyne-platinum(0) complex [Pt(PPh3)2(η2-C6H4)] has been generated by treatment of a mixture of [Pt(PPh3)2(η2-C2H4)] and chlorobenzene with 2,2,6,6-tetramethylpiperid-1-yllithium at 0°C and identified by comparison of its 31P NMR parameters with those of the cyclohexyne analogue, [Pt(PPh3)2(η2-C6H8)]. The compounds isolated from the reaction and identified by NMR spectroscopy and X-ray crystallography are the (2,2′-biphenyldiyl)platinum(II) complex [Pt(η1: η1-C6H4C6H4)(PPh 3)2], formed by reaction of [Pt(PPh3)r (η2-C6H4)] with free benzyne, and the orthometallated (η1-phenyl)platinum(II) complex [Pt{C6H4(PPh2)-2}(C6H 5)-(PPh3)], formed by internal hydrogen-atom migration in [Pt(PPh3)2(η2-C6H4)]. The complex [Pt(PPh3)2(η2-C6H8)] undergoes a similar isomerization on heating in benzene to give the (η1-cyclohexen-1-yl)platinum(II) complex [Pt{C6H4(PPh2)-2}(C6H 9)(PPh3)], whose structure has also been determined by X-ray crystallography.
