作者:Yash Paul、Suresh Magotra、Sushil K. Pandey
DOI:10.1080/15533170701674868
日期:2007.11.1
Cyclometallacyclophosphazene complexes of titanium(IV) corresponding to [N(PPh2NR)(2)}(n)TiCl4-n], [N(PPh2NR)(2)}(n)TiCl2-n] (OPri)(2)], [N(PPh2NR)(2)}(n)[GRAPHICS](OPri)(2-n)](R = Ph or SiMe3, G = CH2CH2, n = 1 or 2) have been synthesized under anhydrous and inert conditions by the reaction of acyclic bis-silylated phosphazene ligand (A), [HN(PPh2NSiMe3)(2)] with TiCl4, TiCl2(OPri)(2) or[GRAPHICS](OPri)(2) in 1:1 and 2:1 molar ratios. These titanatriazadiphosphorines were characterized by elemental analyses (C, H, N, Cl and Ti), molecular weight determination, and spectral studies including IR and NMR (H-1, C-13, and P-31), which have indicated monomeric nature of the complexes and bidentate mode of bonding by phosphazene moiety leading to a trigonal bipyramidal and octahedral geometries around the titanium atom in 5 and 6 coordination numbers.