Structures of Copper(II) N-tert-Butylbenzoyl and N-Phenylpivaloyl Hydroxamates in the Crystalline State and in a Frozen Solution View Full Text


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Article Info

DATE

2021-06

AUTHORS

A. V. Rotov, I. A. Yakushev, E. A. Ugolkova, N. N. Efimov, V. V. Minin

ABSTRACT

The geometric structures of compounds CuL2 (L = R1N(O)–(O)CR2; R1 = tert-Bu, R2 = Ph (I) and R1 = Ph, R2 = tert-Bu (II)) are studied by X-ray diffraction analysis (XRD) in the crystalline state and by stationary EPR spectroscopy in a dichloromethane solution. According to the XRD data (CIF files CCDC nos. 1875367 and 2022310, respectively), in the crystalline state the copper atoms of both complexes exist in the planar-square environment of the oxygen atoms with the trans-coordination of the hydroxamate ligands. According to the EPR data for frozen solutions of the complexes in dichloromethane, the compounds coexist as two mononuclear forms A and B differed in magnetic resonance parameters. It is shown that compound IB forms aggregates when freezing the solution. The form B of compound II is an associate of the copper complex with the solvent molecules. The EPR data indicate that both forms of compounds I and IIA form no associates with the solvent molecules. More... »

PAGES

376-381

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1070328421060051

DOI

http://dx.doi.org/10.1134/s1070328421060051

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1139551329


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