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Diorganotin(IV) complexes of 2,5-dithiobiurea (H2dtbu). The crystal structures of Me2Sn(dtbu) and Ph2Sn(dtbu)

✍ Scribed by Rufen Zhang; Jiafeng Sun; Chunlin Ma

Publisher: John Wiley and Sons
Year: 2006
Tongue: English
Weight: 744 KB
Volume: 17
Category: Article
ISSN: 1042-7163
DOI: 10.1002/hc.20173

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✦ Synopsis

The diorganotin(IV) complexes, R 2 Sn(dtbu) (R = Me 1, n-Bu 2, Ph 3, PhCH 2 4; H 2 dtbu = 2,5-dithiobiurea), have been synthesized and characterized by IR, 1 H, and 119 Sn NMR spectroscopy. The structures of 1 and 3 have been determined by X-ray crystallography. Crystal structures show that both complexes 1 and 3 consist of molecules in which the bideprotonated ligand is N,S,S-bonded, and the tin atom exhibits distorted pentacoordination with small differences between the methyl and phenyl derivatives in bond distances and bond angles. The unusual coordination mode of the dtbu 2-anion creates four-and five-membered chelate rings. Moreover, the packing of complexes 1 and 3 are stabilized by the hydrogen bonding.

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