Phenyl isocyanate interactions with tin(IV) halides

✍ Scribed by Clifford Owens; Julia M. Woods; Anne Kelly Filo; Louis L. Pytlewski; David E. Chasan; Nicholas M. Karayannis

• Book ID: 104138180
• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 618 KB
• Volume: 37
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)95523-3

✦ Synopsis

Studies of the interactions of phenyl isocyanate with SnX4 (X = Cl, Br, I) in carbon tetrachloride solution, at ambient temperature, and of the solid products isolated are reported. S&l4 and SnBr4 yielded I:2 adducts with CJI&'O, under these experimental conditions, These complexes were characterized as octahedral trans-[SnX4(0CNCe-H&J ; the two phenyl isocyanate ligands are oxygenbonded to the Sn4' ion and occupy tram 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 CeHsNCO ligand. The interaction of Snl, 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. i'he N:O (2:l) and Sn:I (I:l) atomic ratios in this precipitate, in combination with the infrared evidence, suggest that the reaction proceeds via either insertion of Cd-I,NCO between Sn-I bonds or partial ionization of Sn14 in the presence of the organic ligand, while the organic components of the solid product are mixtures or reaction products of Gas-NC0 and phenylimido(CJI&=)

group derivatives.

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