Structural Studies of 2,6-Diacetyl- and 2,6-Diformylpyridine Bis(thiosemicarbazones)

• Main Authors: Brown Christine A., Kaminsky Werner, Claborn Kacey A., Goldberg Karen I., West Douglas X.
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2002-01-01
• Series: Journal of the Brazilian Chemical Society
• Subjects: bis(thiosemicarbazones); 2,6-diacetylpyridine; 2,6-diformylpyridine; crystal structures; metal complexes
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000100003

Although a large number of crystal structures of heterocyclic thiosemicarbazones have recently appeared in the literature, few structures of heterocyclic bis(thiosemicarbazones) or their metal complexes have been reported. Complexes of iron(II), indium(III), tin(IV), bismuth(III) involve bis(thiosemicarbazones) coordinating as N3S2 pentadentate ligands, often resulting in 7-coordinate complexes. In contrast, complexes with zinc(II) are often binuclear with thiosemicarbazone moieties of a bis(thiosemicarbazone) coordinating to two different zinc centers. Also included in this study is the structure of the first complex with a 2,6-diformylpyridine bis(thiosemicarbazone) ligand, a 4-coordinate nickel(II) complex with unusual coordination.