ABSTRACT
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 -4.07â (5) and -6.78â (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 151.6â (3) and 152.5â (3)°. The bond lengths of the two nitrile triple bonds are 1.133â (5) and 1.137â (5)â Å.
ABSTRACT
The complex molecule of the title compound, [Rh2{N(C6H5)COCH3}4(NCC7H7)], has crystallographically-imposed mirror symmetry. The four acetamide ligands bridging the dirhodium core are arranged in a 2,2-cis manner with two N atoms and two O atoms coordinating to the unique Rh(II) atom cis to one another. The Neq-Rh-Rh-Oeq torsion angles on the acetamide bridge are 0.75â (7) and 1.99â (9)°. The axial nitrile ligand completes the distorted octa-hedral coordination sphere of one Rh(II) atom and shows a nonlinear coordination, with an Rh-N-C bond angle of 162.8â (5)°; the N-C bond length is 1.154â (7)â Å.
ABSTRACT
The complex molecule of the title compound, [Rh2{N(C6H5)COCH3}4(C6H5CN)2], exhibits crystallographically imposed centrosymmetry. The four acetamide ligands bridging the dirhodium core are arranged in a 2,2-cis manner, with two N atoms and two O atoms coordinating to the unique Rh(II) atom cis to one another. The Neq-Rh-Rh-Oeq torsion angles on the acetamide bridges vary between 1.62â (4) and 1.78â (4)°. The Rh-Rh bond length is 2.4319â (3)â Å. The axial nitrile ligand completes the distorted octahedral coordination sphere and shows a non-linear coordination with an Rh-N-C bond angle of 167.14â (15)°, while the N-C bond length is 1.135â (3)â Å.
ABSTRACT
In the title compound, [Rh2(C8H8NO)4(C8H7N)], the four acetamidate ligands bridging the dirhodium core are arranged in a 2,2-trans manner. One Rh(II) atom is five-coordinate, in a distorted pyramidal geometry, while the other is six-coord-in-ate, with a disorted octa-hedral geometry. For the six-coord-inate Rh(II) atom, the axial nitrile ligand shows a non-linear Rh-nitrile coordination with an Rh-N-C bond angle of 166.4â (4)° and a nitrile N-C bond length of 1.138â (6)â Å. Each unique Rh(II) atom is coordinated by a trans pair of N atoms and a trans pair of O atoms from the four acetamide ligands. The Neq-Rh-Rh-Oeq torsion angles on the acetamide bridge varies between 12.55â (11) and 14.04â (8)°. In the crystal, the 3-methyl-benzo-nitrile ring shows a π-π inter-action with an inversion-related equivalent [inter-planar spacing = 3.360â (6)â Å]. A phenyl ring on one of the acetamide ligands also has a face-to-face π-π inter-action with an inversion-related equivalent [inter-planar spacing = 3.416â (5)â Å].
ABSTRACT
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 = 2.4290â (6)â Å], two acetamidate O atoms trans to each other [Rh-O = 2.044â (3)â Å], two acetamidate N atoms trans to each other [Rh-N = 2.091â (4)â Å], and a benzonitrile N atom trans to Rh [Rh-N = 2.222â (3)â Å]. The structure is held together by weak van der Waals forces.
