Structural and spectroscopic trends in the phosphine Os(II) complexes OsHCl(CO)(L)(PPh.sub.3).sub.2

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Publisher: Elsevier B.V.
Document Type: Report
Length: 189 words

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Abstract :

Keywords Phosphine ligands; Osmium; Isocyanide; Structure Highlights * Single substitution of a single triphenylphoshpine in OsHCl(CO)(PPh.sub.3).sub.3 with permethylated phosphines gives OsHCl(CO)(PR.sub.3)(PPh.sub.3).sub.2 with the new phosphine trans to the hydride. * The trans.sup.2J.sub.HP coupling is variable and dependent on donor phosphine electronic and steric effects. * A new non twinned structure of OsHCl(CO)(PPh.sub.3).sub.3 and the isocyanide OsHCl(CNNPPh.sub.3)(CO)(PPh.sub.3).sub.2 are reported. Abstract A series of four isostructural Os(II) complexes, OsHCl(CO)(L)(PPh.sub.3).sub.2 with mutually trans triphenylphosphines and a stereospecifically introduced ligand L trans the hydride have been prepared by treating OsHCl(CO)(PPh.sub.3).sub.3 with PMe.sub.3, PMe.sub.2Ph, PMePh.sub.2, and CNN=PPh.sub.3. These new derivatives have been characterized spectroscopically and by single crystal X-ray diffraction in three cases. In addition, an ordered non-twinned structure of the starting material has been obtained. Structures of three of these complexes as well as OsHCl(CO)(PPh.sub.3).sub.3 provide an insight into the bonding and chemistry of this useful fragment. Author Affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, H3A 0B8, Canada * Corresponding author. Article History: Received 27 February 2019; Revised 29 April 2019; Accepted 30 April 2019 Byline: Quentin Gaydon, Harrison Cassidy, Ohhyeon Kwon, Pierre-Louis Lagueux-Tremblay, D. Scott Bohle [] (*)

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Gale Document Number: GALE|A586807586