Title: On the Sn–O Bond in Some Pyridine<i>N</i>-Oxide Complexes of Tin(IV)
Abstract:Abstract The stability constants of several pyridine N-oxide complexes of trimethyltin chloride and dimethyltin dichloride have been measured spectrophotometrically in acetonitrile. The values decreas...Abstract The stability constants of several pyridine N-oxide complexes of trimethyltin chloride and dimethyltin dichloride have been measured spectrophotometrically in acetonitrile. The values decrease with an increase in the electron-attracting power of the substituent on the pyridine ring. The infrared spectra of several pyridine N-oxide complexes of tin(IV) have been measured from 60 cm−1 to 5000 cm−1. The Sn–O stretching vibration has been observed in the region of 300—400 cm−1, and the frequency depends considerably on the substituents of the tin atom. The Sn–O stretching frequency in the pyridine N-oxide complexes of tin(IV) is rather lower than those in alkyltin alkoxides, which have a large covalent character in the Sn–O bond, but it is higher than those in trialkyltin carboxylates, which have an ionic character in the Sn–O bond. The Sn–O bond in the pyridine N-oxide complexes has been assumed to have a rather large ionic character, from the fact that the dependence of the stability constant on the substituent of the pyridine ring is similar to that of the pKa of the ligand, and from the fact that the frequency of the Sn–O stretching vibration is rather close to that of the trialkyltin carboxylates.Read More
Publication Year: 1967
Publication Date: 1967-11-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 31
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