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Crystal structure of chlorido-bis-[(1,2,5,6-?)-cyclo-octa-1,5-diene]iridium(I).

ABSTRACT: The title complex, [IrCl(C₈H₁₂)₂], was synthesized directly from the reaction of IrCl₃·3H₂O with a large excess of cod (cod = cyclo-octa-1,5-diene) in alcoholic solvent. Large yellow needles were obtained by the slow cooling of a hot solution. Based on the positions of the chloride ligand and the mid-points of the four C=C bonds, the mol-ecule adopts a five-coordinate geometry that is midway between square pyramidal and trigonal bipyramidal. The material crystallizes in the ortho-rhom-bic space group Pbca with one mol-ecule per asymmetric unit in a general position and shows no significant inter-molecular inter-actions. Individual mol-ecules are aligned along [010], and these rows form a pseudo-hexa-gonal packing arrangement.

SUBMITTER: Rahman AK

PROVIDER: S-EPMC5290581 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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Crystal structure of chlorido-bis-[(1,2,5,6-η)-cyclo-octa-1,5-diene]iridium(I).

Rahman A K Fazlur AK Wilklow-Marnell Miles M Brennessel William W WW Jones William D WD

Acta crystallographica. Section E, Crystallographic communications 20170127 Pt 2

The title complex, [IrCl(C8H12)2], was synthesized directly from the reaction of IrCl3·3H2O with a large excess of cod (cod = cyclo-octa-1,5-diene) in alcoholic solvent. Large yellow needles were obtained by the slow cooling of a hot solution. Based on the positions of the chloride ligand and the mid-points of the four C=C bonds, the mol-ecule adopts a five-coordinate geometry that is midway between square pyramidal and trigonal bipyramidal. ...[more]

PMID: 28217358

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Serendipitous preparation of fac-(aceto-nitrile-κN)tri-chlorido-[(1,2,5,6-η)-cyclo-octa-1,5-diene]iridium(III).

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Bromido[(1,2,5,6-?)-cyclo-octa-1,5-diene]methyl-platinum(II).

Project description:In the title complex, [PtBr(CH(3))(C(8)H(12))], the Pt(II) ion is in a distorted square-planar environment defined by the Br and methyl C atoms and the mid-points of the two ?-coordinated double bonds of cyclo-octa-1,5-diene. As a result of the different trans influences of the Br atom and the methyl group, the Pt-C bonds trans to the methyl group [2.262?(11) and 2.261?(10)?Å] are longer than those trans to the Br atom [2.118?(8) and 2.138?(9)?Å].

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(4-Butyl-1-methyl-1,2,4-triazol-5-yl-idene)[(1,2,5,6-η)-cyclo-octa-1,5-diene](tri-phenyl-phosphane)iridium(I) tetra-fluorido-borate.

Project description:A new triazole-based N-heterocyclic cationic carbene iridium(I) complex with a tetra-fluorido-borate counter-anion, [Ir(C8H12)(C7H13N3)(C18H15P)]BF4, has been synthesized and structurally characterized. The IrI atom of the cationic complex has an expected square-planar coordination environment with unexceptional bond lengths. There are several close F⋯H contacts between the cations and the anions in the range 2.36-2.58 Å, stabilizing the orientation of the out-sphere [BF4 -] counter-anion. In the crystal, C-H⋯π(ring) inter-actions are observed that orient the phenyl rings of the tri-phenyl-phosphane ligands.

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Crystal structures of (?4-cyclo-octa-1,5-diene)bis(1,3-di-methyl-imidazol-2-yl-idene)iridium(I) iodide and (?4-cyclo-octa-1,5-diene)bis-(1,3-di-ethyl-imidazol-2-yl-idene)iridium(I) iodide.

Project description:The title complexes, (?4-cyclo-octa-1,5-diene)bis-(1,3-di-methyl-imidazol-2-yl-idene)iridium(I) iodide, [Ir(C5H8N2)2(C8H12)]I, (1) and (?4-cyclo-octa-1,5-di-ene)bis-(1,3-di-ethyl-imidazol-2-yl-idene)iridium(I) iodide, [Ir(C7H12N2)2(C8H12)]I, (2), were prepared using a modified literature method. After carrying out the oxidative addition of the amino acid l-proline to [Ir(COD)(IMe)2]I in water and slowly cooling the reaction to room temperature, a suitable crystal of 1 was obtained and analyzed by single-crystal X-ray diffraction at 100?K. Although this crystal structure has previously been reported in the Pbam space group, it was highly disordered and precise atomic coordinates were not calculated. A single crystal of 2 was also obtained by heating the complex in water and letting it slowly cool to room temperature. Complex 1 was found to crystallize in the monoclinic space group C2/m, while 2 crystallizes in the ortho-rhom-bic space group Pccn, both with Z = 4.

| S-EPMC7199247 | biostudies-literature

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