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.
Similar content being viewed by others
REFERENCES
Codd, R., Coord. Chem. Rev., 2008, vol. 252, p. 1387.
Baugman, R.G., Brink, D.J., Butle, J.M., and New, P.R., Acta Crystallogr., Sect. C: Cryst. Struct. Commun., 2000, vol. 56, p. 528.
Rotov, A.V., Ugolkova, E.A., Efimov, N.N., et al., Russ. J. Inorg. Chem., 2014, vol. 59, no. 12, p. 1474. https://doi.org/10.1134/S0036023614120201
Dzyuba, V.I., Koval, L.I., Dudko, A.V., et al., J. Coord. Chem., 2014, vol. 67, no. 8, p. 1437.
Rotov, A.V., Ugolkova, E.A., Lermontova, E.Kh., et al., Russ. J. Inorg. Chem., 2015, vol. 60, no. 7, p. 866. https://doi.org/10.1134/S0036023615070128
Abragam, A. and Bleaney, B., Electron Paramagnetic Resonance of Paramagnetic Ions, Oxford: Clarendon, 1970.
Chizhik, V.I., Chernyshev, Y.S., Donets, A.V., et al., Magnetic Resonance and Its Applications, New York: Springer, 2014.
Larin, G.M., Rotov, A.V., and Dzyuba, V.I., Dokl. Akad. Nauk, 1995, vol. 334, no. 6, p. 779.
Larin, G.M., Rotov, A.V., and Dzyuba, V.I., Russ. Chem. Bull., 1999, vol. 48, no. 4, p. 722.
Rotov, A.V., Ugolkova, E.A., Efimov, N.N., and Minin, V.V., Russ. J. Inorg. Chem., 2013, vol. 58, no. 2, p. 186. https://doi.org/10.1134/S0036023613020216
Dzyuba, V.I., Ternovaya, T.V., Kostromina, N.A., and Ksaverov, A.N., Ukr. Khim. Zh., 1986, vol. 52, no. 5, p. 453.
Svetogorov, R.D., Dorovatovskii, P.V., and Lazarenko, V.A., Cryst. Res. Technol., 2020, vol. 55, no. 1900184.
Kabsch, W., Acta Crystallogr., Sect. D: Biol. Crystallogr., 2010, vol. 66, p. 125.
Sheldrick, G.M., Acta Crystallogr., Sect. C: Struct. Chem., 2015, vol. 71, p. 3.
Dolomanov, O.V., Bourhis, L.J., Gildea, R.J., et al., J. Appl. Crystallogr., 2009, vol. 42, p. 339.
Rakitin, Yu.V., Larin, G.M., and Minin, V.V., Interpretatsiya spektrov EPR koordinatsionnykh soedinenii (Interpretation of the ESR Spectra of Coordination Compounds), Moscow: Nauka, 1993.
Wilson, R. and Kivelson, D., J. Chem. Phys., 1966, vol. 44, no. 1, p. 154.
Lebedev, Ya.S. and Muromtsev, V.I., EPR i relaksatsiya stabilizirovannykh radikalov (ESR and Relaxation of Stabilized Radicals), Moscow: Khimiya, 1972.
Barclay, S.J. and Raymond, K.N., Inorg. Chem., 1986, vol. 25, no. 20, p. 3561.
Talzi, E.P., Nekipelov, V.M., Kozyrev, N.V, and Zamoraev, K.I., Zh. Strukt. Khim., 1982, vol. 23, no. 6, p. 158.
Funding
This work was carried out in terms of state assignment of the Kurnakov Institute of General and Inorganic Chemistry (Russian Academy of Sciences) in the area of basic research.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Additional information
Translated by E. Yablonskaya
Rights and permissions
About this article
Cite this article
Rotov, A.V., Yakushev, I.A., Ugolkova, E.A. et al. Structures of Copper(II) N-tert-Butylbenzoyl and N-Phenylpivaloyl Hydroxamates in the Crystalline State and in a Frozen Solution. Russ J Coord Chem 47, 376–381 (2021). https://doi.org/10.1134/S1070328421060051
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1070328421060051