Abstract
Cyclometallacyclophosphazene complexes of titanium(IV) corresponding to [{N(PPh2NR)2}nTiCl4‐n], [{N(PPh2NR)2}nTiCl2‐n (OPri)2], and [{N(PPh2NR)2}n
(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], or bis‐phenylated phosphazene ligand (B), [HN(PPh2NPh)2] with TiCl4, TiCl2(OPri)2 or
(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 (1H, 13C, and 31P), 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.
Acknowledgments
Dedicated to Professor Dr. Herbert W. Roesky on his 70th birthday.
We gratefully acknowledge financial support from the Department of Science and Technology, New Delhi. The authors are thankful to the Regional Research Laboratory, Jammu and Central Drug Research Institute, Lucknow for spectral studies. Yash Paul is thankful to Department of Science and Technology, New Delhi for Junior Research Fellowship.