Abstract: A copper(II) complex with 6-(3,5-dimethyl-1H-pyrazol-1-yl)-2-(pyridin-2-yl)pyrimidin-4-amine (L), [CuLCl2], has been synthesized. This compound is formed irrespective of the Cu : L molar ratio (Cu : L = 1 : 1, 2 : 1, and 20 : 1) in the MeOH/H2O/DMF mixture as a single product. ESI-MS data demonstrate that the additional amount of CuCl2 above the Cu : L = 1 : 1 molar ratio, is effectively solvated, and high-nuclearity species are formed in trace amounts in the solution. The complex adopts a distorted square-pyramidal geometry with two chlorides and three nitrogen atoms from L. The electronic spectrum of the complex contains a broad band with a maximum at 12,820 cm(-1) within the region characteristic for square-pyramidal chromophores CuA(5) (A=Cl, N). Due to Cu center dot center dot center dot Cl contacts, the molecules of [CuLCl2] form the dinuclear [CuLCl2](2) unit. Surprisingly, the NH2-group participates in the formation of NH center dot center dot center dot Cl hydrogen bonds instead of the formation of (NH center dot center dot center dot N3((pyrimidine)))(2) synthon, which is common for N-heteroaromatic compounds containing the NH2-group in the alpha-position to aza-atom. These hydrogen bonds together with Cu center dot center dot center dot Cl contacts result in the formation of a 3-D-structure.

Cite: Bushuev M.B. , Gatilov Y.V. , Krivopalov V.P. , Nikolaenkova E.B.
Copper(II) complex with 6-(3,5-dimethyl-1H-pyrazol-1-yl)-2-(pyridin-2-yl)pyrimidin-4-amine: synthesis, crystal structure, and electronic spectroscopy
Journal of Coordination Chemistry. 2012. V.65. N3. P.550-558. DOI: 10.1080/00958972.2012.657187 WOS Scopus РИНЦ

Dates:

Published online:	Feb 2, 2012
Published print:	Feb 10, 2012

Identifiers:

Web of science	WOS:000302035700016
Scopus	2-s2.0-84856915520
Elibrary	17976619
OpenAlex	W2061243845

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