Novel Cobalt Bis-o-semiquinonato Complexes with Bidentate N-Donor Ligands

A. A. Zolotukhin; Золотухин А. А.; M. P. Bubnov; Бубнов М. П.; R. V. Rumyantsev; Румянцев Р. В.; G. K. Fukin; Фукин Г. К.; A. S. Bogomyakov; Богомяков А. С.; V. K. Cherkasov; Черкасов В. К.

doi:10.31857/S0132344X22700165

Novel Cobalt Bis-o-semiquinonato Complexes with Bidentate N-Donor Ligands

作者: Zolotukhin A.A.¹, Bubnov M.P.¹, Rumyantsev R.V.¹, Fukin G.K.¹, Bogomyakov A.S.², Cherkasov V.K.¹
隶属关系:
1. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Nizhny Novgorod, Russia
2. International Tomography Center, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
期: 卷 49, 编号 3 (2023)
页面: 174-182
栏目: Articles
URL: https://journal-vniispk.ru/0132-344X/article/view/137276
DOI: https://doi.org/10.31857/S0132344X22700165
EDN: https://elibrary.ru/BOCLWY
ID: 137276

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详细

Two new cobalt bis-o-semiquinonato complexes, (Pyz-Phen)Co(3,6-DBSQ)2 (I) and (Bpyz)Co(3,6-DBSQ)2 (II) (Pyz-Phen = pyrazino[2,3-f][1,10]phenanthroline, Bpyz = bipyrazine, 3,6-DBSQ = 3,6-di-tert-butyl-o-benzoquinone radical anion), were synthesized. According to X-ray diffraction data, both complexes have a trigonal-prismatic geometry of the inner coordination sphere. The distribution of C–O and Co–O bond lengths, which reflects the valence state of the metal and the ligands, indicates that the complexes are formed by cobalt(II) surrounded by two semiquinone radical anions. The results of magnetochemical measurements show that the pyrazino[2,3-f][1,10]phenanthroline complex is a derivative of low-spin divalent cobalt, whereas its bipyrazine structural analogue is a high-spin cobalt(II) derivative.

关键词

cobalt complexes, o-semiquinones, trigonal prism, magnetic properties

参考

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