A 119Sn Mössbauer Study of Tin(IV) Complexes of 2- and 4-Benzoylpyridine Thiosemicarbazone and 4-Benzoylpyridine Semicarbazone

被引：0

作者：

Anayive Pérez-Rebolledo

José D. Ardisson

Geraldo M. de Lima

Waldemar A. A. Macedo

Heloisa Beraldo

机构：

[1] Universidade Federal de Minas Gerais,Departamento de Química

[2] Centro de Desenvolvimento da Tecnologia Nuclear,Laboratório de Física Aplicada (LFA/CDTN)

来源：

Hyperfine Interactions | 2005年 / 163卷

关键词：

Sn Mössbauer; tin(IV) complexes; thiosemicarbazones; semicarbazones;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A 119Sn Mössbauer study was carried out of tin(IV) complexes with 2-benzoylpyridine thiosemicarbazone (H2Bz4DH) and its N(4)-methyl (H2Bz4M) and N(4)-phenyl (H2Bz4Ph) derivatives: [Sn(2Bz4DH)Cl3] (1), [Sn(2Bz4DH)PhCl2] (2), [Sn(2Bz4M)Cl3] (3), [H22Bz4M]2[Ph2SnCl4] (4), [Sn(2Bz4Ph)PhCl2] (5), [Sn(2Bz4Ph)Ph2Cl] (6), in which H2Bz4R stands for the neutral ligand and 2Bz4R stands for the anionic thiosemicarbazone. In addition, 119Sn Mössbauer studies of the tin(IV) complexes [Sn(H4Bz4DH)2Cl4H2O] (7), [Sn(H4BzPS)2Cl4H2O] (8) with 4-benzoylpyridine thiosemicarbazone (H4Bz4DH) and the correspondent semicarbazone (H4BzPS) were performed. The isomer shifts decrease upon coordination due to the variation in the percentage of s character as tin changes from approximately sp3 hybridization in the tin salts to sp3d2 in the octahedral or sp3d3 in the heptahedral complexes. The Mössbauer parameters of compound (4) showed the existence of two tin(IV) sites, which have been attributed to the presence of the cis and trans isomers.

引用

页码：89 / 94

页数：5

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