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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Syntheses and X-ray crystal structures of [Co(#eta#~2-CO_3)(NH_3)_4](NO_3) centre dot 0.5H_2O and [(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)Co(NH_3)_3][NO_3]_2 centre dot H_2O
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Syntheses and X-ray crystal structures of [Co(#eta#~2-CO_3)(NH_3)_4](NO_3) centre dot 0.5H_2O and [(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)Co(NH_3)_3][NO_3]_2 centre dot H_2O

机译:[Co(#eta#〜2-CO_3)(NH_3)_4](NO_3)中心点0.5H_2O和[(NH_3)_3Co(#mu#-OH)_2(#mu#-)的合成和X射线晶体结构CO_3)Co(NH_3)_3] [NO_3] _2中心点H_2O

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摘要

[Co(#eta#~2-CO_3)(NH_3)_4](NO_3) centre dot 0.5H_2O and [(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)Co(NH_3)_3][NO_3]_2 centre dot H_2O were prepared by prolonged aerial oxidation of a solution of Co(NO_3)_2 centre dot 6H_2O and ammonium carbonate in aqueous ammonia. The formation of these side products highlights the richness of the chemistry of these systems and the possibility of by products if methods are not strictly adhered to. The X-ray crystal structures of [Co(#eta#~2-CO_3)(NH_3)_4](NO_3) centre dot 0.5H_2O and [(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)Co(NH_3)_3][NO_3]_2 centre dot H_2O reveal a monomeric octahedral cobalt center with #eta#~2-bound CO_3~(2-) in the former, while the latter consists of a dimeric array where the two cobalt centers are bridged by two OH~- and one #mu#_2-CO_3~(2-) groups with three terminal NH_3 ligands for each Co center. In both complexes extensive hydrogen bonding interactions are evident.
机译:[Co(#eta#〜2-CO_3)(NH_3)_4](NO_3)中心点0.5H_2O和[(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)Co(NH_3)_3] [NO_3] _2中心点H_2O是通过Co(NO_3)_2中心点6H_2O和碳酸铵在氨水中的长时间空气氧化制备的。这些副产物的形成突显了这些体系化学的丰富性,以及如果不严格遵守方法的话,可能会产生副产物。 [Co(#eta#〜2-CO_3)(NH_3)_4](NO_3)中心点0.5H_2O和[(NH_3)_3Co(#mu#-OH)_2(#mu#-CO_3)的X射线晶体结构)Co(NH_3)_3] [NO_3] _2中心点H_2O揭示了一个单体八面体钴中心,前者中有#eta#〜2-键合的CO_3〜(2-),后者由二聚体阵列组成,其中两个钴中心被两个OH〜-和一个#mu#_2-CO_3〜(2-)基桥接,每个Co中心带有三个末端NH_3配体。在两种配合物中,广泛的氢键相互作用都是显而易见的。

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