119Sn Mossbauer, NMR (~1H, ~(13)Cand ~(119)Sn)and infrared study of tetracoordinatedtin(IV) complexes with 4-[((E)-1-{2-hydroxy-5-[(E)-2-(aryl)-1-diazenyl]phenyl}methylidene)amino]benzoates

摘要

A series of organotin(IV) complexes of composition R3Sn[02CC6H4(N=C(H)C6H3-2-OH(N=NC6H4R)}-p} (R = Ph or Bz; R = H, 2-CH_3, 3-CH_4-CH_3) have been investigated by ~(119)SnMossbauer, ~1H, 13)C, SnNMR and IRspectroscopic techniques. ~(119)SnMossbauer data indicated a distorted tetrahedralgeometry for the triphenyltin(IV) complexes while the tribenzyltin complexes ex-hibit a distorted trigonal bipyramidal coordination geometry with equatorial benzylgroups and the axial positions occupied by an O atom from the carboxylate ligandand the O atom from the water ligand. The ~(119)Sn-NMRchemical shifts confirm thatthe Sn atom in triorganotin complexes is four-coordinate in CDCl_3solution.