Synthesis, Characterization, and X-ray Structures of Diphenyltin(IV) N-(2-Hydroxyacetophenone)glycinate, Its 1:1 Adduct with Triphenyltin(IV) Chloride, and Related Systems

The compound [Ph₂Sn(2-OC₆H₄C(CH₃)NCH₂COO)], 1, shows a distorted trigonal-bipyramidal geometry in the solid state. Reaction of 1 with Ph₃SnCl yields a 1:1 adduct in which the two tin atoms are joined via the carbonyl atom of the ligand in 1 to form a mixed diorgano/triorgano species. NMR data indicate that the 1:1 adduct dissociates in noncoordinating solvent. Similarly, [^tBu₂Sn(2-OC₆H₄C(CH₃)NCH₂COO)·^tBu₂SnCl₂], which has been characterized crystallographically in the solid state, is dissociated in solution. In contrast to the above behavior, monomeric [Vin₂Sn(2-OC₆H₄C(CH₃)NCH₂COO)] forms an adduct with a water molecule to yield [Vin₂Sn(2-OC₆H₄C(CH₃)NCH₂COO)OH₂] in the solid state.