Varisco Massimo, Crochet Aurelien, Mamula Steiner Olimpia
University of Applied Sciences of Western Switzerland, HES-SO, HEIA-FR, Boulevard de Pérolles 80, CH-1700 Fribourg, Switzerland.
Université de Fribourg, Département de Chimie, Chemin du Musée 9, CH-1700 Fribourg, Switzerland.
Acta Crystallogr E Crystallogr Commun. 2022 Apr 5;78(Pt 5):464-467. doi: 10.1107/S2056989022003589. eCollection 2022 May 1.
The crystal structure of [CoCl(CHN)][CoCl(CHN)(HO)] or [Co()Cl(μ-Cl)][Co()(Cl)(OH)], where is the enanti-opure bidentate ligand (-)-5,6-pinenebi-pyridine (CHN), has been determined. Crystals suitable for X-ray structure analysis were obtained by slow evaporation of an ethano-lic solution containing equimolar amounts of and CoCl·6HO. The Co cations all have a coordination number of five, and in each case the coordination polyhedron is a trigonal bipyramid. The Co-N bonds lengths range from 2.037 (7) to 2.195 (7) Å, and Co-Cl bonds lengths range from 2.284 (2) to 2.509 (2) Å. The asymmetric unit contains two discrete complexes, one dinuclear and the other mononuclear. Between the two mol-ecules, two types of inter-molecular inter-actions have been evidenced: π-π stackings involving the bi-pyridine units, and O-H⋯Cl hydrogen bonds between the hydrogen atoms of the aqua ligand coordinating to the mononuclear complex and the non-bridging chlorido ligand coordinating to the dinuclear mol-ecule. These inter-actions lead to a two-dimensional supra-molecular arrangement parallel to the plane.
已确定[CoCl(CHN)][CoCl(CHN)(HO)]或[Co()Cl(μ-Cl)][Co()(Cl)(OH)]的晶体结构，其中为对映体纯的双齿配体(-)-5,6-蒎烯联吡啶(CHN)。通过缓慢蒸发含有等摩尔量和CoCl·6HO的乙醇溶液，获得了适合进行X射线结构分析的晶体。Co阳离子的配位数均为5，且在每种情况下，配位多面体均为三角双锥。Co-N键长范围为2.037 (7)至2.195 (7) Å，Co-Cl键长范围为2.284 (2)至2.509 (2) Å。不对称单元包含两个离散的配合物，一个双核，另一个单核。在这两个分子之间，已证实存在两种分子间相互作用：涉及联吡啶单元的π-π堆积，以及与单核配合物配位的水合配体的氢原子与与双核分子配位的非桥连氯配体之间的O-H⋯Cl氢键。这些相互作用导致了平行于平面的二维超分子排列。
