Dianion N-1,N-4-bis(salicylidene)-S-allyl-thiosemicarbazide complexes: Synthesis, structure, spectroscopy and thermal behavior

作者：Ahmadi Mehdi; Mague Joel T; Akbari Alireza; Takjoo Reza^*

来源：Polyhedron, 2012, 42(1): 128-134.

DOI：10.1016/j.poly.2012.05.004

• Isorhiosemicarbazide
• N2O2 donor
• TGA
• Spectroscopy
• Crystal structures

The products with the general formulas VO(Salits) 1, Mn(Salits)Br 2, Fe(Salits)Cl 3 and UO2(Salits)(MeOH)4 (Salits = N-1,N-4-bis(salicylidene)-S-allyl-thiosemicarbazide) are prepared by the reaction of salicylaldehyde-S-allyl-thiosemicarbazone (H2L) and salicylaldehyde with VOSO4 center dot 3H(2)O, Mn(CH3COO)(2)center dot 4H(2)O, FeCl3 center dot 6H(2)O and UO2(CH3COO)(2)center dot 2H(2)O, respectively. Complexes 1-4 were characterized by elemental analysis, spectroscopic (FT-IR and UV-Vis) and TGA techniques. Crystal and molecular structures of the complexes were determined by single crystal X-ray diffraction. The results revealed that the complexes 1,2 and 3 contain a dideprotonated tetradentate form of Salits coordinated via N2O2 donors along with oxido, bromido or chlorido ligands, respectively, and they have distorted square pyramidal geometries. However, the complex 4 adopts a severely distorted pentagonal bipyramidal geometry consisting of N2O2 coordination of Salits, a methanol ligand and two oxygens of the uranyl moiety. TG analysis showed that complex 3 is more stable than the others.

• 出版日期2012-7-25