STUDY ON OXO-CENTERED HETEROTRINULEAR TRANSITION METAL CARBOXYLATE COMPLEXES: Ⅱ. CRYSTAL STRUC TURES

• 出 处: 结构化学
• 发表日期: 1992年05期
• 关键词: dynamically triangle pyridine trigonal planar disordered arrangement serial cite

The title compounds are isomorphous, they belong to trigonal space group R32, with crystallographic parameters: [Fe2MnO(O2CCH3)6Py3] ·Py: Mr = 853. 31, a = 17. 609(3), c=11. 056(3)(?), V = 2968. 9(?)3, Z = 3, Dc=1. 43 gcm-3, μ(MoKα) = 10. 9 cm-1, F (000) = 1317; [Fe2CoO(O2CCH3)6Py3]·Py: Mr = 857. 30, a = 17. 542(3), c=11. 049(2)(?), V = 2944. 8(?)3, Z = 3, Dc=1. 45 gem-3, μ (MoKα) = 12. 07 cm-1, F (000) = 1323. The structure of [Fe2MnO (O2CCH3)6Py3]·Py has been determined with the final R = 0. 042 for 663 reflections. The three crystallographically equivalent metal atoms form an equilateal triangle with side of 3. 324(?). The central oxygen aotm is on the three - fold axis with M - O distance 1. 919(?). The planar M3O core is normal to the three -fold axis and also to the solvate pyridine, which is dynamically disordered round this axis and is sandwiched by two Fe2MnO(O2CCH3)6Py3 molecules.