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Polymorphism in [Co(SCN)(4)(ppz-H)(2)] (ppz, piperazine)

Manna, S.C., Jana, A.D., Drew, M.G.B., Mostafa, G. and Chaudhuri, N.R. (2008) Polymorphism in [Co(SCN)(4)(ppz-H)(2)] (ppz, piperazine). Polyhedron, 27 (4). pp. 1280-1286. ISSN 0277-5387

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To link to this item DOI: 10.1016/j.poly.2007.12.016

Abstract/Summary

A one-pot reaction of [Co(NO3)(2)center dot 6H(2)O and piperazine] with NH4SCN/NaSCN in water-methanol (1:1) solvent leads to two polymorphs of [Co(SCN)(4)(ppz-H)(2)] (ppz, piperazine) (I and II). X-ray crystal structure reveals both have same space group but the differences in the alignment of pendant SCN- leads to two polymorphs. In I, trifurcated N-H...S hydrogen bonding plays a prominent role in crystal packing leading to S...S interactions between SCN fragments but in II, no such trifurcation arises and thereby the crystal packing occurs through hydrogen bonding interactions only leading to a distinctly different network topology. TG/DSC and FT-IR study reveal they are enantiotropically related. (c) 2007 Elsevier Ltd. All rights reserved.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11458
Uncontrolled Keywords:Co(II), SCN-, piperazine, polymorphism , YELLOW ISOXAZOLONE DYE, CONFORMATIONAL POLYMORPHISM, CRYSTAL POLYMORPHISM, DRUG, ISOMERS, EXAMPLE

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