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Tetra-kis[?-N-(2,4,6-trimethyl-phen-yl)acetamidato]-??N:O;??O:N-bis-[(benzo-nitrile-?N)rhodium(II)](Rh-Rh).

ABSTRACT: The title structure, [Rh?(C??H??NO)?(C?H?N)?], contains a dinuclear Rh complex of point symmetry -4 with an Rh-Rh unit and two benzonitrile ligands located in special positions along the twofold axis passing through -4. Four symmetry-equivalent mesitylacetamidate ligands bridge the Rh-Rh unit. Thus, each Rh(II) atom has an approximately octa-hedral coordination by one Rh [Rh-Rh = 2.4290?(6)?Å], two acetamidate O atoms trans to each other [Rh-O = 2.044?(3)?Å], two acetamidate N atoms trans to each other [Rh-N = 2.091?(4)?Å], and a benzonitrile N atom trans to Rh [Rh-N = 2.222?(3)?Å]. The structure is held together by weak van der Waals forces.

SUBMITTER: Eagle CT

PROVIDER: S-EPMC3393156 | biostudies-literature | 2012 Jul

REPOSITORIES: biostudies-literature

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Tetra-kis[μ-N-(2,4,6-trimethyl-phen-yl)acetamidato]-κ⁴N:O;κ⁴O:N-bis-[(benzo-nitrile-κN)rhodium(II)](Rh-Rh).

Eagle Cassandra T CT Kpogo Kenneth K KK Zink Landon C LC Smith Albert E AE

Acta crystallographica. Section E, Structure reports online 20120613 Pt 7

The title structure, [Rh₂(C₁₁H₁₄NO)₄(C₇H₅N)₂], contains a dinuclear Rh complex of point symmetry -4 with an Rh-Rh unit and two benzonitrile ligands located in special positions along the twofold axis passing through -4. Four symmetry-equivalent mesitylacetamidate ligands bridge the Rh-Rh unit. Thus, each Rh(II) atom has an approximately octa-hedral coordination by one Rh [Rh-Rh = 2.4290 (6) Å], two acetamidate O atoms trans to each other [Rh-O = 2.044 (3) Å], two acetamidate N atoms trans to eac ...[more]

PMID: 22807724

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cis-Tetra-kis(?-N-phenyl-acetamidato)-?(4) N:O;?(4) O:N-bis-[(benzo-nitrile-?N)rhodium(II)](Rh-Rh).

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Crystal structure of tetra-kis-(?-N-phenyl-acetamidato)-?(4) N:O;?(4) O:N-bis-[(2-methyl-benzo-nitrile-?N)rhodium(II)](Rh-Rh).

Project description:The complex molecule of the title compound, [Rh2{N(C6H5)COCH3}4(C8H7N)2], exhibits inversion symmetry. The four acetamidate ligands bridging the dirhodium core are arranged in a 2,2-trans manner with two N atoms and two O atoms coordinating to each Rh(II) atom trans to one another. The Neq-Rh-Rh-Oeq torsion angles on the acetamidate bridge vary between -4.07?(5) and -6.78?(7)°. The axial nitrile ligands complete the distorted octa-hedral coordination sphere of each Rh(II) atom and show a nonlinear coordination with Rh-N-C bond angles of 151.6?(3) and 152.5?(3)°. The bond lengths of the two nitrile triple bonds are 1.133?(5) and 1.137?(5)?Å.

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(3-Methyl-benzo-nitrile-1?N)-cis-tetra-kis(?-N-phenyl-acetamidato)-1:2?(4) N:O;1:2?(4) O:N-dirhodium(II)(Rh-Rh).

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