Synthesis and characterisation of tin(IV) and organotin(IV) complexes of N '-2-hydroxyphenyl-6-methylpyridine-2-carbaldimine. X-ray crystal structures of n-butyldichloro[N '-2-hydroxyphenyl-6-methylpyridine-2-carbaldiminato(1-) N,N ',O]tin(IV) and diphenylchloro [N '-2-hydroxyphenyl-6-methyl-puridine-2-carbaldiminato(1-) N,N ',O]tin(IV)

The reactions of N'-2-hydroxyphenyl-6-methylpyridine-2-carbaldimine (LH) with tin(IV) chloride and organotin(IV) chlorides result in the formation of the corresponding tin(IV) and organotin(IV) complexes in which LH behaves as a uninegative tridentate ligand coordinating to the central tin atom sia an N,N,O donor set. Crystal structure determinations of two of the compounds, n-butyldichloro[N'-2-hydroxyphenyl-6-methylpyridine-2-carbaldiminato(1-)N,N',O]tin(IV) ( BuSnCl2 .L) and diphenylchloro[N'-2-hydroxyphenyl-6-methylpyridine-2-carbaldiminato(1-)N,N',O]tin(IV) (Ph2SnCl . L), have been performed and both structures feature distorted octahedral geometries about the tin centres. Systematic differences in the Sn-ligand separations are rationalised in terms of the reduced Lewis acidity of tin in Ph2SnCl . L.