# Organometallics of diphosphazanes * V. The different coordination behaviour of cis- and trans-cyclodiphosphazanes towards Group 6 metal carbonyl moieties

Reddy, Sreenivasa V and Krishnamurthy, SS and Nethaji, M (1992) Organometallics of diphosphazanes * V. The different coordination behaviour of cis- and trans-cyclodiphosphazanes towards Group 6 metal carbonyl moieties. In: Journal of Organometallic Chemistry, 438 (1-2). pp. 99-115.

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## Abstract

The reactions of cyclodiphosphazanes $[PhNP(OR)]_2 (R = CH_2CF_3 (1)\hspace{2mm}and\hspace{2mm}C_6H_4Me-p (2))$ with Group 6 metal carbonyl derivatives have been investigated. The stereochemistry of the ligand appears to play a significant role in determining its coordination behaviour. The cyclodiphosphazane 1 (isolated as the trans-isomer) affords the dinuclear complexes 9-11 in which the two metal centres are bridged by the diphosphazane ligand. In contrast the cyclodiphosphazane 2 (isolated as a 3/1 mixture of cis-and trans-isomers) yields the mononuclear complexes 3-7 in which the cyclodiphosphazane is coordinated in the $\eta^1$-fashion. The structures of $[W(CO_4(NHC_5H_{10}) (PhNP(OC_6H_4Me-p))_2]$ (6) and $[Mo(CO)_4(NHC_5H_{10})2\mu-[PhNP(OCH_2 CF_3)]_2]$ (9a) have been determined by X-ray crystallography.

Item Type: Journal Article Copyright of this article belongs to Elsevier Science Organometallics;diphosphazanes;trans-cyclodiphosphazanes;carbonyl moieties Division of Chemical Sciences > Inorganic & Physical Chemistry 13 Feb 2008 19 Sep 2010 04:42 http://eprints.iisc.ernet.in/id/eprint/12819