The synthesis, and molecular and crystal structure of diphenyl(2-oxidonaphthylmethyl-iminoacetato)tin(IV)

The new diorganotin complex ((C 6 H 5 ) 2 Sn(OC 10 H 6 CH=NCH 2 COO)) was prepared and characterized by 1 H NMR, IR, elemental analysis, and a single crystal X-ray diffraction study. The crystals are monoclinic, space group P2 1 /a with a = 16.9167(9) Å, b = 19.1276(16) Å, c = 26.538(2) Å, β = 100.534(6)°, V = 8442.5(11) Å 3 , Z = 16, and D calc = 1.574 Mg m −3 . The final discrepancy factors are R F = 0.030, and R W = 0.021 for 6524 significant reflections. The tin atom has a distorted trigonal bipyramidal coordination, with no short intermolecular contacts. The two axial SnO bonds of 2.12 Å and 2.09 Å and the equatorial SnN bond of 2.14 Å are among the shortest found in related complexes. Key words: diorganotin(IV), bicycloazastannoxide, trigonal bipyramidal, antitumour.