Polymorphism in metal complexes of thiazole-4-carboxylic acid

Meundaeng, Natthaya; Rujiwatra, Apinpus; Prior, Timothy J.

Abstract

Five new molecular complexes of chemical formula [M(4-tza)₂(H₂O)₂] (M = Co, Ni, and Cu) and a complex of [Cu(4-tza)₂]∙4H₂O using thiazole-4-carboxylic acid (4-tza) as the ligand have been successfully synthesized and structurally characterized by single crystal X-ray diffraction. Two district polymorphs (α and β) are found for both [Co(4-tza)₂(H₂O)₂] and [Ni(4-tza)₂(H₂O)₂]. The effects of solvent composition and temperature on the formation of these polymorphs have been investigated and phase behaviour of the polymorphs was studied through X-ray powder diffraction. Unlike two complexes of Co and Ni, [Cu(4-tza)₂(H₂O)₂] does not display polymorphism but exhibits irreversible structural transformation from [Cu(4-tza)₂(H₂O)₂] to the dehydrated form, [Cu(4-tza)₂], upon heating.

Citation

Meundaeng, N., Rujiwatra, A., & Prior, T. J. (2016). Polymorphism in metal complexes of thiazole-4-carboxylic acid. Transition Metal Chemistry, 41(7), 783-793. https://doi.org/10.1007/s11243-016-0079-7

• Journal Article Type: Article
• Acceptance Date: Jun 30, 2016
• Online Publication Date: Jul 26, 2016
• Publication Date: 2016-10
• Deposit Date: Jul 5, 2016
• Publicly Available Date: Jul 26, 2016
• Journal: Transition metal chemistry
• Print ISSN: 0340-4285
• Electronic ISSN: 1572-901X
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 41
• Issue: 7
• Pages: 783-793
• DOI: https://doi.org/10.1007/s11243-016-0079-7
• Keywords: Thiazole-4-carboxylic acid; Crystal structure; Nickel; Cobalt; Copper; Polymorph
• Public URL: https://hull-repository.worktribe.com/output/440626
• Publisher URL: http://link.springer.com/article/10.1007/s11243-016-0079-7?view=classic
• Additional Information: This is a copy of an open access article published in: Transition metal chemistry. The final publication is available at Springer via http://dx.doi.org/10.1007/s11243-016-0079-7