Thermodynamics of metalligand bond formation XXXV. Lewis acidity of tin(IV) halides

• Published in: Inorganica Chimica Acta Vol. 133; no. 2; pp. 239 - 241
• Main Authors: Farhangi, Y., Graddon, D.P.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.10.1987; Elsevier Science
• Subjects: Chemical thermodynamics; Chemistry; Elements, mineral and organic compounds; Exact sciences and technology; General and physical chemistry; General. Theory; Metals and alloys; Mixtures; Thermodynamic properties; Nitrile; Tertiary arsine; Nitrone; Inorganic stannane; Heat of reaction; Tin IV Compounds; Lewis base; Thermodynamic properties; Formation; Adduct
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/S0020-1693(00)87772-5

Thermodynamic data have been obtained for the reactions in benzene solution at 30°C of tin tetrahalides with the following Lewis bases: triphenylarsine, tetrahydrothiophene, tetrahydrofuran, pyridine-N-oxide, dimethylsulphoxide, dimethylformamide and acetonitrile. Triphenylarsine forms a 1:1 adduct of low stability with tin tetrachloride and fails to react with the other halides. The other bases when they react form both 1:1 and 1:2 adducts, the reactivity decreasing in the order SnCl 4 > SnBr 4 > SnI 4. THT and THF do not react with SnI 4; CH 3CN does not react with SnBr 4 or SnI 4. When it is possible to determine data separately for formation of successive adducts it is found that K 1 > K 2 for SnCl 4 and SnBr 4 but K 1 < K 2 for SnI 4.