The crystal and molecular structure of an unusual triorganotin complex: 1-[(4′-methylphenylimino)-methyl]-2-naphtholchlorotriphenyltin(IV)(3:2)

Abstract

The crystal and molecular structure of the triphenyltin complex of 1-[4′-methylphenylimino)-methyl]-2-naphthol at 295 and 120 K is reported. The compound crystallises with a ligand:triphenyltin chloride ratio 3:2. At 295 K, the crystals are monoclinic, space group C2/ c, a = 10.525(3), b = 23.724(4), c = 30.150(9) Å, β = 96.150(23)°, V = 7343.13 Å 3, Z = 8, D calc = 1.407 Mg m −3,μ = 0.82 mm −1, final R = 4.7% for 4014 unique observed reflections. At 120 K, the crystals are monoclinic, space group C2/ c, a = 10.399(2), b = 23.145(5), c = 30.139(4) Å, β = 95.837(12)°, V = 7216.40 Å 3, Z = 8, D calc = 1.431 Mg m −3, μ = 0.82 mm −1, final R = 4.3% for 7212 unique observed reflections. The complex has a five-coordinate trigonal bipyramidal structure, with the phenyl groups taking up the equatorial positions around the tin atom. The ligand, which exists in the form of a zwitterion in the complex, binds to the tin via the phenolic oxygen atom. Free ligand has cocrystallised with the complex in the ratio of one free ligand molecule to every two of the organotin complex units. The free ligand molecules pack in parallel strings in the crystal, between the organotin complex moieties, which are arranged as pairs of centrosymmetrically-related dimers.