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Cis-Tetra-kis(μ-N-phenyl-acetamidato)-κ(4) N:O;κ(4) O:N-bis-[(benzo-nitrile-κN)rhodium(II)](Rh-Rh).

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 1.62 (4) and 1.78 (4)°. The Rh-Rh bond length is 2.4319 (3) 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 167.14 (15)°, while the N-C bond length is 1.135 (3) Å.

SUBMITTER: Eagle CT

PROVIDER: S-EPMC3684889 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

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

Eagle Cassandra T CT Quarshie Fredricka F Ketron Megan E ME Atem-Tambe Nkongho N

Acta crystallographica. Section E, Structure reports online 20130518 Pt 6

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 1.62 (4) and 1.78 (4)°. The Rh-Rh bond length is 2.4319 (3) Å. The axial nitrile ligand completes the distorted octahed ...[more]

PMID: 23794991

Similar Datasets

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

Project description: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 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.

| S-EPMC3393156 | biostudies-literature

(3-Methyl-benzo-nitrile-κN)tetra-kis(μ-N-phenyl-acetamidato)-κ(4) N:O;κ(4) O:N-di-rhodium(II)(Rh-Rh).

Project description: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 166.4 (4)° and a nitrile N-C bond length of 1.138 (6) 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 12.55 (11) and 14.04 (8)°. In the crystal, the 3-methyl-benzo-nitrile ring shows a π-π inter-action with an inversion-related equivalent [inter-planar spacing = 3.360 (6) 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 = 3.416 (5) Å].

| S-EPMC3884982 | biostudies-literature

Crystal structure of tetra-kis-(μ-N-phenyl-acetamidato)-κ(4) N:O;κ(4) O:N-bis-[(2-methyl-benzo-nitrile-κN)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.

| S-EPMC4186189 | biostudies-literature

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

Project description: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 0.75 (7) and 1.99 (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 162.8 (5)°; the N-C bond length is 1.154 (7) Å.

| S-EPMC4158479 | biostudies-literature

Redetermination of cis-bis-(ethyl-ene-diamine-κ(2) N,N')bis-(nitrito-κN)cobalt(III) (ethyl-enediamine-κ(2) N,N')tetra-kis-(nitrito-κN)cobaltate(III) monohydrate.

Project description:The structure of the title compound, [Co(NO2)2(NH2CH2CH2NH2)2][Co(NO2)4(NH2CH2CH2NH2)]·H2O, was redetermined with a modern CCD-equipped diffractometer. In comparison with the original determination based on photographic data [Kushi et al. (1976 ▶). Inorg. Nucl. Chem. Lett. 12, 629-633], the current study allows the location of reliable postions for the H atoms and thus leads to better understanding of the inter-ionic and inter-molecular inter-actions. The crystal structure consists of an octa-hedrally coordinated cationic Co(III) complex ion, an octa-hedrally coordinated anionic Co(III) complex ion and a lattice water mol-ecule. The complex cation, complex anion and lattice water mol-ecule are connected by an intricate network of O-H⋯O and N-H⋯O hydrogen bonds, forming a three-dimensional structure.

| S-EPMC3588370 | biostudies-literature

Crystal structure of an unknown solvate of (piperazine-κN){5,10,15,20-tetra-kis-[4-(benzo-yloxy)phen-yl]porphyrinato-κ(4) N}zinc.

Project description:The title compound, [Zn(C72H44N4O8)(C4H10N2)] or [Zn(TPBP)(pipz] (where TPBP and pipz are 5,10,15,20-tetra-kis-[4-(benzo-yloxy)phen-yl]porphyrinato and piperazine ligands respectively), features a distorted square-pyramidal coordin-ation geometry about the central Zn(II) atom. This central atom is chelated by the four N atoms of the porphyrinate anion and further coordinated by a nitro-gen atom of the piperazine axial ligand, which adopts a chair confirmation. The average Zn-N(pyrrole) bond length is 2.078 (7) Å and the Zn- N(pipz) bond length is 2.1274 (19) Å. The zinc cation is displaced by 0.4365 (4) Å from the N4C20 mean plane of the porphyrinate anion toward the piperazine axial ligand. This porphyrinate macrocycle exhibits major saddle and moderate ruffling deformations. In the crystal, the supra-molecular structure is made by parallel pairs of layers along (100), with an inter-layer distance of 4.100 Å while the distance between two pairs of layers is 4.047 Å. A region of electron density was treated with the SQUEEZE [Spek (2015 ▸). Acta Cryst. C71, 9-18] procedure in PLATON following unsuccessful attempts to model it as being part of disordered n-hexane solvent and water mol-ecules. The given chemical formula and other crystal data do not take into account these solvent mol-ecules.

| S-EPMC4992910 | biostudies-literature

Pyridinium bis-(pyridine-κN)tetra-kis-(thio-cyanato-κN)ferrate(III)-pyrazine-2-carbo-nitrile-pyridine (1/4/1).

Project description:In the title compound, (C5H6N)[Fe(NCS)4(C5H5N)2]·4C5H3N3·C5H5N, the Fe(III) ion is located on an inversion centre and is six-coordinated by four N atoms of the thio-cyanate ligands and two pyridine N atoms in a trans arrangement, forming a slightly distorted octa-hedral geometry. A half-occupied H atom attached to a pyridinium cation forms an N-H⋯N hydrogen bond with a centrosymmetrically-related pyridine unit. Four pyrazine-2-carbo-nitrile mol-ecules crystallize per complex anion. In the crystal, π-π stacking inter-actions are present [centroid-centroid distances = 3.6220 (9), 3.6930 (9), 3.5532 (9), 3.5803 (9) and 3.5458 (8) Å].

| S-EPMC3647816 | biostudies-literature

cis-Di-aqua-tetra-kis-(1-butyl-1H-imidazole-κN (3))nickel(II) dichloride.

Project description:In the title compound, [Ni(C7H12N2)4(H2O)2]Cl2, the nickel(II) ion has a distorted octa-hedral coordination environment. It is surrounded by three N atoms and one O atom occupying the equatorial plane, and one N and one O atom in the axial positions. The imidazole ring systems are inclined to one another with dihedral angles varying between 38.3 (4) and 74.1 (4)°. In the crystal, mol-ecules are linked via O-H⋯Cl hydrogen bonds involving one Cl(-) anion and the water mol-ecule in the equatorial plane, forming an inversion dimer-like arrangement. The water mol-ecule in the axial position is hydrogen-bonded to both Cl(-) anions. There are also a number of C-H⋯Cl hydrogen bonds present, forming a three-dimensional structure. All four alkyl chains are disordered over two positions with refined occupancy ratios of 0.395 (15):0.605 (15), 0.658 (14):0.342 (14), 0.332 (11):0.668 (11) and 0.622 (12):0.378 (12).

| S-EPMC3884482 | biostudies-literature

Bis[tetra-kis-(pyridin-2-yl)methane-κ(3) N,N',N'']cobalt(II) tetra-kis-(thio-cyanato-κN)cobaltate(II) methanol monosolvate.

Project description:The title complex, [Co(C21H16N4)2][Co(NCS)4]·CH3OH, consists of one [Co{C(py)4}2](2+) complex cation [C(py)4 = tetra-kis-(pyridin-2-yl)methane], one [Co(NCS)4](2-) complex anion and a methanol solvent mol-ecule. In the cation, the Co(II) atom is coordinated by six N atoms of two C(py)4 ligands in a distorted octa-hedral geometry. In the anion, the Co(II) atom is coordinated by the N atoms of four NCS(-) ligands in a distorted tetra-hedral geometry. The methanol mol-ecule is disordered and was modelled over three orientations (occupancies 0.8:0.1:0.1). There are two weak hydrogen-bond-like inter-actions between the methanol solvent mol-ecule and NCS(-) ligands of the anion [O⋯S = 3.283 (3) and 3.170 (2) Å].

| S-EPMC3998407 | biostudies-literature

Bis(dicyanamido-κN)tetra-kis-(pyridine-κN)nickel(II).

Project description:In the crystal structure of the title compound, [Ni(C(2)N(3))(2)(C(5)H(5)N)(4)], the Ni(II) cations are coordinated by four pyridine ligands and two dicyanamide anions into discrete complexes. The shortest Ni⋯Ni separation is 8.1068 (10) Å. The structure is pseudo-centrosymmetric and can also be refined in the space group C2/c in which both anionic ligands are strongly disordered and the refinement leads to significantly poorer reliability factors.

| S-EPMC3379085 | biostudies-literature

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