丙酮酸异烟酰腙四核有机锡配合物的合成、表征及{[nBu2Sn(C9H8N3O3)O]SnBu3n}2的晶体结构

The tetranuclear alkyltin(Ⅳ) compounds {R2Sn(C9H8N3O3)O]SnR3}2 R=n-Bu (1), 4-CNC6H4CH2 (2),C6H5CH2 (3), 4-ClC6H4CH2 (4)] were prepared by the reaction of Schiff base ligand pyruvic acid isonicotinyl hydrazone with (R3Sn)2O in the corresponding molar ratio of 1:1. All compounds have been characterized by elemental analysis, IR and ^1H NMR spectra. The crystal structure of compound 1 was determined by X-ray single crystal diffractional analysis. This compound exhibits a dimeric structure containing distannoxane units with two types of the tin atoms. For the first tin atom, it appears to be seven-coordinated with a distorted pentagonal bipyramid geometry, and the other is five-coordinated with a distorted trigonal bipyramidal geometry. The molecules are packed in the unit cell in two-dimensional network structure through an interaction between the N atoms of the pyridine and the tin atoms of an adjacent molecule.

Synthesis and Characterization of Tetranuclear Alkyltin(IV) Compounds with Schiff Base Ligand Pyruvic Acid Isonicotinyl Hydrazone and Crystal Structure of {[nBu2Sn(C9H8N3O3)O]SnBun}2

The tetranuclear alkyltin(IV) compounds {R₂Sn(C₉H₈N₃O₃)O]SnR₃}₂ R=n‐Bu ( 1 ), 4‐CNC₆H₄CH₂ ( 2 ), C₆H₅CH₂ ( 3 ), 4‐ClC₆H₄CH₂ ( 4 )] were prepared by the reaction of Schiff base ligand pyruvic acid isonicotinyl hydrazone with (R₃Sn)₂O in the corresponding molar ratio of 1:1. All compounds have been characterized by elemental analysis, IR and ¹H NMR spectra. The crystal structure of compound 1 was determined by X‐ray single crystal diffractional analysis. This compound exhibits a dimeric structure containing distannoxane units with two types of the tin atoms. For the first tin atom, it appears to be seven‐coordinated with a distorted pentagonal bipyramid geometry, and the other is five‐coordinated with a distorted trigonal bipyramidal geometry. The molecules are packed in the unit cell in two‐dimensional network structure through an interaction between the N atoms of the pyridine and the tin atoms of an adjacent molecule.