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The synthesis and structural properties of a series of chromium tricarbonyl 'piano-stool' complexes bearing substituted pentafulvene ligands were studied. The complexes, tricarbonyl(1,3,6-triphenylfulvene)chromium(0) benzene hemisolvate, [Cr(C24H18)(CO)3]·0.5C6H6 (I), tricarbonyl[1,3-diphenyl-6-(3-vinylphenyl)fulvene]chromium(0), [Cr(C26H20)(CO)3] (II), and tricarbonyl[1,3-diphenyl-6-(pyren-1-yl)fulvene]chromium(0), [Cr(C34H22)(CO)3] (III), each have a distorted octahedral geometry, with the fulvene coordinated in a ⍤-η²:⍤-η²:⍤-η² fashion. Significant deviation of the exocyclic fulvene double bond from the cyclopentadiene plane accompanies coordination. Evidence of non-covalent ⍤-⍤ interactions was observed in both (I) and (III), with centroid-to-centroid distances ranging from 3.330(8) to 3.494(8)Å. [ABSTRACT FROM AUTHOR]

The title compound, [IrCl(C12H8NO)2{(CH3)2SO}]ºH3CCN or [IrCl(fppy)2(DMSO)] ºH3CCN [where fppy is 4-(pyridin-2-yl)benzaldehyde and DMSO is dimethyl sulfoxide], is a mononuclear iridium(III) complex including two fppy ligands, a sulfur-coordinating DMSO ligand, and one terminal chloride ligand that define a distorted octahedral coordination sphere. The complex crystallizes from 1:1 DMSO--acetonitrile as an acetonitrile solvate. In the crystal, weak C-- H ... O and C--H ... N hydrogen-bonding interactions between adjacent complexes and between the acetonitrile solvent and the complex consolidate the packing. [ABSTRACT FROM AUTHOR]