Synthesis, molecular, and crystal structure of a new organotin/Schiff-base complex C28H31Cl3NO4Sn

A new organotin/Schiff-base complex C28H31Cl3NO4Sn (1) was synthesized by the reaction of beta -butoxycarbonylethyltin trichlorides (2) with 2-hydroxy-1-naphthalidene-4-methoxyaniline (3) in the presence of benzene, and characterized by single-crystal X-ray diffraction, IR, and elemental analysis. Yellow rectangular rods of the title complex crystallize as a benzene solvate of formula C28H31Cl3NO4Sn (1) in the triclinic space group P-1. The unit cell has a = 9.274(3) Angstrom, b = 13.066(2) Angstrom, c = 13.579(3) Angstrom, alpha = 69.463(12)degrees, beta = 89.04(2)degrees, gamma = 73.36(2)degrees, and Z = 2. It is found that atom H riding on phenolic O in free ligand (3) has transferred to imine atom N due to the coordination of phenolic O with Sn after the complex formation, while an intro-molecular hydrogen bond still exists between phenolic O and N (N . . .O, 2.572(3) Angstrom). Sn is coordinated by three chloride atoms, one carbon atom and two oxygen atoms, resulting in a distorted octahedra.