Synthesis and molecular structure of nBu 2[(MeO) 3C 6H 2C(O)N 2CHC 6H 4O]Sn formed in the reaction of di-n-butyltin(IV) oxide with 3,4,5-trimethoxy-benzoyl salicylahydrazone

Abstract

The title complex was synthesized and characterized by 1H, 13C, 119Sn NMR and IR spectra. A single crystal X-ray diffraction study confirmed its molecular structure and revealed that 3,4,5-trimethoxy-benzoyl salicylahydrazone was a tridentate and approximately planar ligand. The complex crystallizes in the triclinic space group P 1 with a = 9.208(3), b = 12.536(2), c = 12.187(4) Å, α = 113.12(2), β = 90.58(2), γ = 81.42(2)°, V = 1277.5(6) Å 3, Z = 2. The structure was refined to R = 0.033 and R W = 0.041 for 3944 observed independent reflections. The tin atom has a distorted trigonal bipyramidal coordination. The SnC bond lengths are 2.129(5) and 2.113(5) Å (av. 2.121(5) Å), the CSnC angle is 123.3(2)°; the bond length between the tin atom and the cheating nitrogen is 2.173(3) Å. Two chain carbon atoms and the chelating nitrogen atom occupy the basal plane. The skeleton of two erect oxygen atoms and the tin atom is bent (OSnO angle = 153.5(1)°). In the complex, the ligand exists in the enol-form.