134453-02-4Relevant academic research and scientific papers
Organometallic derivatives of diphosphazanes. 2.1 Seven-coordinated group 6 metal tricarbonyl complexes of diphosphazane ligands. X-ray crystal structure of [WI2(CO)3{P(OPh)2}2NPh]
Balakrishna, Maravanji S.,Krishnamurthy, Setharampattu S.,Manohar, Hattikudur
, p. 2522 - 2525 (2008/10/08)
The reactions of the complexes [MI2(CO)3-(NCMe)2] (M = Mo, W) with the diphosphazane ligands RN{P(OPh)2}2 (R = Me, Ph) in CH2Cl2 at room temperature afford new seven-coordinated complexes of the type [MI2(CO)3{P(OPh)2}2NR]. The molybdenum complexes are sensitive to air oxidation even in the solid state, whereas the tungsten complexes are more stable in the solid state and in solution. The structure of the tungsten complex [WI2(CO)3{P(OPh)2}2NPh] has been determined by single-crystal X-ray diffraction. It crystallizes in the orthorhombic system with the space group Pna 21, a = 19.372 (2) ?, b = 11.511 (1) ?, c = 15.581 (1) ?, and Z = 4. Full-matrix least-squares refinement with 3548 reflections (I > 2.5σ(I)) led to final R and Rw values of 0.036 and 0.034, respectively. The complex adopts a slightly distorted pentagonal-bypyramidal geometry rarely observed for such a type of complexes; two phosphorus atoms of the diphosphazane ligand, two iodine atoms, and a carbonyl group occupy the equatorial plane, and the other two carbonyl groups, the apical positions.
DIPHOSPHAZANES AS LIGANGS : LINKS BETWEEN PHOSPHORUS CHEMISTRY AND ORGANOMETALLIC CHEMISTRY
Balakrishna, M. S.,Prakasha, T. K.,Krishnamurthy, S. S.
, p. 409 - 412 (2007/10/02)
The reactivity of several new acyclic, cyclic and bicyclic diphosphazanes towards Group-6 metal and iron carbonyls, and Pd, Pt and Rh derivatives has been studied.The structures of the products have been elucidated by IR and NMR spectroscopy and confirmed in a few instances by single crystal X-ray analyses.
