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Phenyl isocyanate interactions with tin(IV) halides
Journal article   Peer reviewed

Phenyl isocyanate interactions with tin(IV) halides

Clifford Owens, Julia M. Woods, Anne Kelly Filo, Louis L. Pytlewski, David E. Chasan, Nicholas M. Karayannis and Carol L Owens
Inorganica Chimica Acta, v 37(C), pp 89-94
1979
DOI: https://doi.org/10.1016/S0020-1693(00)95523-3

Abstract

Studies of the interactions of phenyl isocyanate with SnX 4 (X = Cl, Br, I) in carbon tetrachloride solution, at ambient temperature, and of the solid products isolated are reported. SnCl 4 and SnBr 4 yielded 1:2 adducts with C 6H 5NCO, under these experimental conditions. These complexes were characterized as octahedral trans-[SnX 4(OCNC 6H 5) 2]; the two phenyl isocyanate ligands are oxygen-bonded to the Sn 4+ ion and occupy trans positions, relative to each other, in the first coordination sphere of this metal ion. Stabilization of the cis-isomers in the solid state is apparently sterically hindered, owing to the presence of the bulky phenyl substituent in the C 6H 5NCO ligand. The interaction of SnI 4 with phenyl isocyanate resulted in the formation of reaction rather than addition products. A solid precipitate, formed in low yield, appears to be a mixture of organic compounds and a tin complex. The N:O (2:1) and Sn:I (1:1) atomic ratios in this precipitate, in combination with the infrared evidence, suggest that the reaction proceeds via either insertion of C 6H 5NCO between SnI bonds or partial ionization of SnI 4 in the presence of the organic ligand, while the organic components of the solid product are mixtures or reaction products of C 6H 5NCO and phenylimido(C 6H 5N) group derivatives.

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