145086-16-4Relevant academic research and scientific papers
PHOSPHORUS-NITROGEN HETEROCYCLES AS LIGANDS IN ORGANOMETALLIC CHEMISTRY
Krishnamurthy, S. S.,Reddy, V. Sreenivasa,Chandrasekaran, A.,Nethaji, M.
, p. 99 - 106 (2007/10/02)
λ3-Cyclodiphosphazanes of the type (RNPX)2 (R=Ph, X=OC6H4-Me-p or OCH2CF3) react with Group 6 metyl carbonyls to yield a variety of complexes depending on the geometrical disposition of the substituents on the phosphorus with respect to the P2N2 ring.Coordination occurs through the phosphorus centre(s) in the ν1- or bridged bidentate(μ-)modes.On the other hand (amino)λ5-cyclotriphosphazenes afford Group 6 metal carbonyl complexes in which a phosphazene ring nitrogen atom is involved in coordination besides exocyclic nitrogen atoms.Complexes of Group 10 metal chlorides with cyclotriphosphazene ligands have also been synthesized.NMR spectroscopic and X-ray crystallographic studies have been carried out to elucidate the structures of the complexes.
Organometallics of diphosphazanes. V. The different coordination behaviour of cis- and trans-cyclodiphosphazanes towrds Group 6 metal carbonyl moieties
Reddy, V. Sreenivasa,Krishnamurthy, S. S.,Nethaji, M.
, p. 99 - 115 (2007/10/02)
The reactions of cyclodiphosphazanes 2 (R = CH2CF3 (1) and C6H4Me-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 η1-fashion.The structures of > (6) and 22>> (9a) have been determined by X-ray crystallography.
