Dinuclear organotin(IV) complexes with bis-acyl-hydrazones containing flexible linker: Synthesis, spectroscopic investigation and crystal structure of dimethyl- and diphenyltin(IV) complexes with succinic dihydrazones

摘要: Abstract Four new dinuclear organotin(IV) complexes, (R2Sn)2La [R = Me (1), R = Ph (2)] and (R2Sn)2Lb (3), (4)], have been synthesized from the reaction of R2SnCl2 (R = Me or Ph) with bis(2-hydroxy-3-methoxybenzylidene)succinohydrazide (H4La) bis(5-bromo-2-hydroxybenzylidene)succinohydrazide (H4Lb). The compounds investigated by elemental analysis, IR, 1H NMR, 13C NMR 119Sn spectroscopy. results show all complexes are two doubly deprotonated tridentate domain acyldihydrazone is coordinated to SnR2 moieties via phenolic oxygen, imine nitrogen enolic oxygen. structures 1 3 also confirmed X-ray crystallography. Both centrosymmetry alkyl linker chain shows anti conformation. intermolecular weak Sn⋯O bonds lead 1D polymeric containing four-membered Sn2O2 planar rings. On basis data coordination number tin five in solution.