Two new M(II)-radical complexes [M(hfac)2(IM-o-QN)] (M = Ni(1), Zn(2); IM-o-QN = 4'-quinoxalinyl-substituted imino nitroxide; hfac = hexafluoroa-cetylacetonate) have been synthesized and characterized by X-ray diffraction analysis, element analyses, IR and UV-Visible spectroscopy. X-ray analysis reveal that the structures of both complexes are similar configuration and differently spatial symmetries. The complex 1 crystallizes in the triclinic Pī space group with the respective cell parameters: a = 9.1189(18)?Å, b = 9.836(2) Å, c = 18.537(4)
References
[1]
Demir, S., Jeon, I.R., Long, J.R. and Harris, T.D. (2015) Radical Ligand-Containing Single-Molecule Magnets. Coordination Chemistry Reviews, 289-290, 149-176. https://doi.org/10.1016/j.ccr.2014.10.012
[2]
Meng, X.X., Shi, W. and Cheng, P. (2019) Magnetism in One-Dimensional Metal-Nitronyl Nitroxide Radical system. Coordination Chemistry Reviews, 378, 134-150. https://doi.org/10.1016/j.ccr.2018.02.002
[3]
Luneau, D. and Rey, P. (2005) Magnetism of Metal-Nitroxide Compounds Involving Bis-Chelating Imidazole and Benzimidazole Substituted Nitronyl Nitroxide Free Radicals. Coordination Chemistry Reviews, 249, 2591-2611. https://doi.org/10.1016/j.ccr.2005.06.008
[4]
Li, T., Shi, X.J., Chen, P.Y., Yu, S.J. and Tian L. (2017) A Series Bi-Spin Transition Metal(II) Complexes Based on Triazole Nitronyl Nitroxide Radical. Inorganica Chimica Acta, 461, 206-212. https://doi.org/10.1016/j.ica.2017.02.025
[5]
Shi, J.Y., Ma, Z.L., Wang, M.C. and Tian, L. (2021) A Family of 2p-3d Complexes Based on 4,5-dimethyltriazole Nitronyl Nitroxide Radical: Synthesis, Structure, and Magnetic Properties. Inorganica Chimica Acta, 516, Article ID: 120122. https://doi.org/10.1016/j.ica.2020.120122
[6]
Yao, B.L., Guo, Z.L., Zhang, X., Ma, Y., Yang, Z.H., Wang, Q.L., Li, L.C. and Cheng P. (2017) A New Nitronyl Nitroxide Radical as Building Blocks for a Rare S=13/2 High Spin Ground State 2p-3d Complex and a 2p-3d-4f Chain. Crystal Growth & Design, 17, 95-99. https://doi.org/10.1021/acs.cgd.6b01276
[7]
Ratera, I. and Veciana, J. (2012) Playing with Organic Radicals as Building Blocks for Functional Molecular Materials. Chemical Society Reviews, 41,303-349. https://doi.org/10.1039/C1CS15165G
[8]
Li, H.D., Xi, L., Jing, P., Tang, J.K., Wang, Q., Yang, H., Zhai, L.J., Niu, Y.L., Ding, L.F. and Song, Z.J. (2021) Multifunctional Properties Existing in Ln-Nitronyl Nitroxide Single-Chain Magnets. Journal of Materials Chemistry C, 9, 294-302. https://doi.org/10.1039/D0TC04266H
[9]
Wang, X.L., Tian, H.X., Ma, Y., Yang, P.P., Li, L.C. and Liao, D.Z. (2011) Slow Magnetic Relaxation in Lanthanide Complexes with Chelating Imino Nitroxide Radicals. Inorganic Chemistry Communications, 14, 1728-1731. https://doi.org/10.1016/j.inoche.2011.07.016
[10]
Tsukuda, T., Suzuki, T. and Kaizaki, S. (2005) Synthesis, Structure and Magnetic Properties of Lanthanide(III) Complexes with New Imidazole-Substituted Imino Nitroxide Radical. Inorganica Chimica Acta, 358, 1253-1257. https://doi.org/10.1016/j.ica.2004.11.001
[11]
Zhang, Y.J., Wang, J.J. and Chen, J. (2012) Three Nickel(II) and Zinc(II) Complexes with Two Novel Nitronyl Nitroxide Ligands: Syntheses, Crystal Structures, and Luminescent Properties. Zeitschrift für anorganische und allgemeine Chemie, 638, 1849-1854. https://doi.org/10.1002/zaac.201200151
[12]
Ullman, E.F., Call, L. and Osiecki, J.H. (1970) Stable Free Radicals. VIII. New Imino, Amidino, and Carbamoyl Nitroxides. Journal of Organometallic Chemistry, 35, 3623-3631. https://doi.org/10.1021/jo00836a008
[13]
Sheldrick, G.M. (1997) SHELXS-97, Program for Crystal Structure Solution. University of Göttingen, Goettingen.
[14]
Kuznetsova O.V., Romanenko, G.V., Bogomyakov, A.S. and Ovcharenko, V.I. (2020) Synthesis, Structure, and Magnetic Properties of Heterospin Polymers MI[MII(Hfac)L2]. Russian Journal of Coordination Chemistry, 46, 521-527. https://doi.org/10.1134/S1070328420070039
[15]
Spinu, C.A., Pichon, C., Ionita, G., Mocanu, T., Calancea, S., Raduca, M., Sutter, J.P., Hillebrand, M. and Andruh, M. (2021) Synthesis, Crystal Structure, Magnetic, Spectroscopic, and Theoretical Investigations of Two New Nitronyl-Nitroxide Complexes. Journal of Coordination Chemistry, 74, 279-293. https://doi.org/10.1080/00958972.2021.1871900
[16]
Liu, G., Liu, B. and Cheng, J.T. (2013) A New Zinc(II) Complex Containing Nitronyl Nitroxide Radicals: Synthesis, Crystal Structure, and Magnetic Properties. Russian Journal of Coordination Chemistry, 39, 471-474. https://doi.org/10.1134/S1070328413060079