簇阴离子碘五碳己酸盐的四正丁基铵盐的晶体和分子结构

V. Albano, P. L. Bellon, M. Sansoni
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引用次数: 10

摘要

用反相法对三维x射线数据进行了测定,确定了四正丁基碘戊十二羰基六磷酸铵[N(C4H9)4][Rh6(CO)15l]的结构。晶体呈单斜晶型,a= 14.93 (2), b= 20.02 (3), c= 15.50 (2) a, β= 111·0(1)°,空间群P21/n, Z= 4。基于1650个独立反射的结构确定已被细化到R= 0·041。该晶体含有与Rh6(CO)16密切相关的簇阴离子[Rh6(CO)15l]。金属八面体的平均边长为2·746 A。四个羰基中的每一个都在八面体的交替面连接三个金属原子,其余的羰基和碘原子表现为未识别的配体。Rh-l距离为2·709(6)A。阴离子的理想对称是Cs。
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Crystal and molecular structure of the tetra-n-butylammonium salt of the cluster anion iodopentadecacarbonylhexarhodate
The structure of tetra-n-butylammonium iodopentadecacarbonylhexarhodate [N(C4H9)4][Rh6(CO)15l] has been determined from three-dimensional X-ray data collected by counter methods. The crystals are monoclinic with a= 14·93(2), b= 20·02(3), c= 15·50(2)A, β= 111·0(1)°, space group P21/n, and Z= 4. The structure determination, based on 1650 independent reflections, has been refined to R= 0·041. The crystal contains cluster anions [Rh6(CO)15l]– closely related to Rh6(CO)16. The mean edge of the metal octahedron is 2·746 A long. Each of four carbonyl groups bridges three metal atoms on alternate faces of the octahedron and the remaining carbonyl groups and the iodine atom behave as unidentate ligands. The Rh–l distance is 2·709(6)A. The idealized symmetry of the anion is Cs.
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