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The structure of a pentachromium(ii) extended metal atom chain at 3 K: Cotton's conjecture proven

Lookup NU author(s): Dr Charlie McMonagleORCiD, Professor Mike ProbertORCiD


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© 2022 The Royal Society of Chemistry.We provide definitive experimental proof that the archetypal string-like compound [Cr5(tpda)4(NCS)2] has alternating long and short Cr-Cr separations in the solid state, as conjectured by F. A. Cotton, rather than essentially equally spaced Cr atoms, as initially claimed (H2tpda = N2,N6-di(pyridin-2-yl)pyridine-2,6-diamine). Single-crystal X-ray data collected from 292 to 3 K revealed that the misinterpretation is caused by pseudo-merohedral twinning and that bond length alternation is enhanced at low temperature.

Publication metadata

Author(s): Cornia A, Nicolini A, McMonagle CJ, Probert MR

Publication type: Article

Publication status: Published

Journal: Dalton Transactions

Year: 2022

Volume: 51

Pages: 16790-16794

Online publication date: 01/11/2022

Acceptance date: 01/11/2022

ISSN (print): 1477-9226

ISSN (electronic): 1477-9234

Publisher: Royal Society of Chemistry


DOI: 10.1039/d2dt03103e

PubMed id: 36342410


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