Näther Christian, Jess Inke
Institut für Anorganische Chemie, Universität Kiel, Max-Eyth.-Str. 2, 24118 Kiel, Germany.
Acta Crystallogr E Crystallogr Commun. 2023 Sep 8;79(Pt 10):872-876. doi: 10.1107/S2056989023007065. eCollection 2023 Oct 1.
The reaction of cobalt dichloride hexa-hydrate with pyridazine leads to the formation of crystals of the title compound, [CoCl(CHN)]. This compound is isotypic to a number of compounds with other divalent metal ions. Its asymmetric unit consists of a Co atom (site symmetry 2/), a chloride ion (site symmetry ) and a pyridazine mol-ecule (all atoms with site symmetry ). The Co cations are coordinated by four chloride anions and two pyridazine ligands, generating -CoNCl octa-hedra, and are linked into [010] chains by pairs of μ-1,1-bridging chloride anions and bridging pyridazine ligands. In the crystal structure, the pyridazine ligands of neighboring chains are stacked onto each other, indicating π-π inter-actions. Powder X-ray diffraction proves that a pure crystalline phase was obtained. Differential thermonalysis coupled to thermogravimetry (DTA-TG) reveal that decomposition is observed at about 710 K. Magnetic measurements indicate low-temperature metamagnetic behavior as already observed in a related compound.
六水合二氯化钴与哒嗪反应生成标题化合物[CoCl(CHN)]的晶体。该化合物与许多含有其他二价金属离子的化合物同型。其不对称单元由一个Co原子（位点对称性2/）、一个氯离子（位点对称性）和一个哒嗪分子（所有原子位点对称性）组成。Co阳离子由四个氯离子阴离子和两个哒嗪配体配位，生成-CoNCl八面体，并通过成对的μ-1,1-桥连氯离子阴离子和桥连哒嗪配体连接成[010]链。在晶体结构中，相邻链的哒嗪配体相互堆叠，表明存在π-π相互作用。粉末X射线衍射证明获得了纯晶相。差示热分析与热重分析（DTA-TG）表明，在约710 K观察到分解。磁性测量表明，在相关化合物中已观察到低温变磁行为。
