BIDENTATE N, N′ COORDINATION OF A PYRIDINE CARBOXALDEHYDE SCHIFF BASE LIGAND TO DIMETHYLTIN DICHLORIDE IN THE 1:1 MOLECULAR ADDUCT DICHLORODIMETHYL (N′-PHENYLPYRIDINE-2-CARBALDIMINE-N,N′)TIN(IV)

Abstract

The reaction of dimethyltin(IV) dichloride with N′-phenylpyridine-2-carbaldimine results in the formation of the monomeric 1:1 complex, dichlorodimethyl(N′-phenylpyridine-2-carbaldimine-N,N′)tin(IV), Me₂SnCl₂(C₆H₅N = CHC₅H₄N-2). The ligand coordinates to the tin atom in the dichlorodimethyltin(IV) moiety through its pyridyl and imine nitrogen atoms conferring a distorted octahedral geometry to the tin atom. The two methyl groups are trans with respect to each other whilst the two chlorine atoms occupy cis positions. The bond length between the tin and the imine nitrogen atom is 2.540(5)Å whereas that of the pyridyl nitrogen atom to the tin atom is 2.439(4)Å.

Key Words:

• dichlorodimethyl(N′-phenylpyridine-2-carbaldimine-N,N′)tin(IV)
• dimethyltin(IV)dichloride
• X-ray analysis