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1.  Tris(4-formyl­phen­yl)phosphane oxide tetra­hydro­furan hemisolvate 
The title compound, C21H15O4P·0.5C4H8O, contains an ordered phosphane oxide in a general position and a tetra­hydro­furan solvent mol­ecule disordered about a twofold axis. All three aldehyde substituents are nearly coplanar with their attached benzene rings, with C—C—C—O torsion angles in the range 1.64 (17)–4.24 (19)°. All three have different conformations with respect to the P=O group, one syn, one anti, and one gauche. Two of the aldehyde substituents form inter­molecular C—H⋯O contacts.
doi:10.1107/S1600536813020059
PMCID: PMC3793837  PMID: 24109424
2.  μ2-m-Xylylenebis(salicylaldiminato)-bis­(η4-1,5-cyclo­octa­diene)dirhodium(I) dichloro­methane solvate 
In the title solvate, [Rh2(C22H18N2O2)(C8H12)2]·CH2Cl2, each organometallic mol­ecule is composed of two RhI cations, the tetra­dentate dianion α,α′-bis­(salicylaldiminato)-m-xylene and two 1,5-cyclo­octa­diene (COD) ligands. Each RhI atom is coordinated by one O atom [Rh—O = 2.044 (2) and 2.026 (2) Å], one N atom [Rh—N = 2.083 (2) and 2.090 (2) Å], and one COD ligand via two η2-bonds, each directed toward the mid-point of a C=C bond (Cg): Rh—Cg = 2.007 (2), 2.013 (2), 2.000 (2) and 2.021 (2) Å. Each RhI atom has a quasi-square-planar coordination geometry, with average r.m.s. deviations of 0.159 (1) and 0.204 (1) Å from the mean planes defined by Rh and the termini of its four coordinating bonds. The two COD ligands have quasi-C 2 symmetry, twisted from ideal C 2v symmetry by 30.0 (3) and −33.1 (3)°, and are quasi-enanti­omers of one another. The intra­molecular Rh⋯Rh distance of 5.9432 (3) Å suggests that there is no direct metal–metal inter­action.
doi:10.1107/S1600536812040603
PMCID: PMC3470182  PMID: 23125626

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