Oxide, Sulfide, Selenide, and Borane Derivatives of Indenylphosphines

Abstract

We report the preparation, isolation and characterization of oxide, sulfide, selenide, and borane derivatives of a series of indenylphosphines. Some members of the series had already been prepared, and we have completed the series. We have prepared (indenyl)xPh3-xPO (x = 1–3) for the oxide series, (indenyl)xPh3-xPS (x = 3) for the sulfides, (indenyl)xPh3-xPSe (x = 1,2) for the selenides, and (indenyl)xPh3-xPBH3 (x = 1–3) for the boranes. Linear relationships of the 31P NMR chemical shift with the number of indenyl groups were observed. The compounds were also characterized by 1H and 13C NMR spectroscopy and mass spectrometry. The solid-state structure of diindenylphenylphosphine selenide was determined by X-ray crystallography and found to be isomorphous with diindenylphenylphosphine sulfide. The solid-state structure of triindenylphosphine sulfide was also determined by X-ray crystallography and the indenyl groups were confirmed to all be the inden-3-yl isomer. Additionally, pentacarbonyl(triindenylphosphine)molybdenum(0), 1,3-bis(diphenylphosphino)indene diborane, and rac-bis(1-(diphenylphosphino)indenyl)ironII) diborane were prepared, isolated, and characterized.