Decomposition of complex of estertin with Schiff base and characterization of crystal structure of products

Complex MeO2CCH2CH2SnCl4- . H+ (4) and MeO2CCH2CH2SnCl2 . (2-OC6H4-CH = NC6H5) (5) were obtained by decomposing the yellow reaction solution of MeO2CCH2CH2SnCl3 . (2-HOC6H4CH = NC6H5) (3), which is the product of beta-methoxycarbonylethyltin trichlorides (1) with Schiff base (2-HOC6H4CH NC6H5) (2), after standing for 15 d. Complexes 4 & 5 were characterized by elemental analysis, IR and NMR. The crystal structure of complex 4 was determined by X-ray diffraction analysis. The crystal belongs to orthorhombic system, space group P2 cn, a = 0. 785 2 ( 2) nm, b = 1. 223 6 (10) nm, c = 1. 695 2 (4) nm, alpha = beta = gamma = 90degrees, V = 1. 628 7 nm(3), Z = 4, D, = 1. 79 g/cm(3), F(OOO) = 860, mu = 22. 2 cm(-1), R= 0. 044 9, wR= 0. 038 2. Complex 4 exists as a discrete molecule, and the tin atom attains a distorted octahedral geometry via the coordination of intramolecular carbonyl oxygen and chloride ion. The coordination number of tin atom is 6. In complex 5, one chloride ion is replaced by the phenolic oxygen anion. Coordination of carbonyl oxygen atom to tin atom still exists, The coordination number of tin atom is 5.