Synthesis and characterization of organotin(lV) compounds with Schiff base ligand pyruvic acid isonicotinyl hydrazone and crystal structure of [<i>n</i>-Bu₂Sn(C₉H₈N₃O₃)(H₂O)]₂ and {[<i>n</i>-Bu₂Sn(C₉H₈N₃O₃)O]Sn(Bu-<i>n</i>)₃}₂.2H₂O

2301-2306The organotin(IV) compounds [n-Bu2Sn(C9H8N3O3)(H2O)]2 (1) and {[R2Sn(C9 H8N3O3)O]SnR3}2 [R=n-Bu (2), 4-CNC6H4CH2 (3), C6H5CH2 (4)] were prepared by the reaction of Schiff base ligand pyruvic acid isonicotinyl hydrazone with n-BU2SnO or (R3Sn)2O in the corresponding molar ratio of 1:1 and 1:2. All compounds have been characterized by elemental analysis, IR and 1H NMR spectra. The crystal structures of compounds 1 and 2 were determined by X-ray single crystal diffraction analysis. The crystal 1 belongs to orthorhombic with space group Pca2(1), a=2.7529(18) nm, b=0.9668(7) nm, c=1.5750(11) nm, α=90°, β=90°,γ =90°, Z=8, V=4.192(5) nm3 , Dc=1.445 g/cm3, μ=1.243 mm-1, F(000)=1856, R=0.0493,wR=0.1066, and its structure shows a distorted pentagonal bipyramid geometry with seven-coordination for the central tin atom. The crystal 2 belongs to monoclinic with space group P2(1)/c, a=1.4811(16) nm, b=1.3788(15) nm, c=1.923(2) nm, β=99.848(19)o, Z=2, V=3.869(7) nm3, Dc=1.309 g/cm3, μ=1.324 mm-1, F(000)=1556, R=0.0622, wR=0.1403, and it exhibits a dimeric structure containing distannoxane units with two types of tin atoms. For the first tin atom, it appears to be sevencoordinated with distorted pentagonal bipyramid geometry, and the other is five-coordinated with distorted trigonal bipyramidal geometry. Also, the Schiff base ligand pyruvic acid isonicotinyl hydrazone is found to function as trident chelates with O, N and O atoms