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metal-organic compounds
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In the title compound, [Zr(C11H10NO)4]·2C3H7NO, the ZrIV ion is coordinated by four bidentate 5,7-dimethylquinolin-8-olate ligands in a slightly distorted square-antiprismatic coordination environment. The asymmetric unit also contains two N,N′-dimethylformamide (DMF) solvent molecules. In the crystal, a weak C—H
O hydrogen bond links the complex molecule to a solvent molecule and weak π–π stacking interactions [centroid–centroid distance = 3.671 (3) Å] also occur. One of the DMF solvent molecules was refined as disordered over three sets of sites, with refined occupancies in the ratio of 0.391 (9):0.342 (10):0.267 (7).
O hydrogen bond links the complex molecule to a solvent molecule and weak π–π stacking interactions [centroid–centroid distance = 3.671 (3) Å] also occur. One of the DMF solvent molecules was refined as disordered over three sets of sites, with refined occupancies in the ratio of 0.391 (9):0.342 (10):0.267 (7).metal-organic compoundsOpen access
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In the title compound, [Re2(CH3O)2(CO)6(C4H6N3O)], the two ReI atoms are linked by a methoxo and methanolato bridge, as well as by a creatinine ligand that coordinates in a bidentate fashion. Three fac-carbonyl ligands occupy the rest of the slightly distorted octahedral geometry around each ReI atom. The bridging methanolato and methoxo ligands are bent out of the Re2O2 plane by 49.2 (4) and 47.8 (3)° respectively. This is normally associated with a methanolato-bridging-type coordination rather that the more planar methoxo-type bridging. Furthermore, the creatinine bridging molecule is very slightly distorted from the Re2N2C plane, indicating that the pyrazolo N atom bonded to the RhI atom is not protonated. Charge balance can thus only be attained if one assumes a positional disorder for the methanolato/methoxo H atom. All attempts to locate disordered protons around these O atoms were unsuccessful. Four hydrogen bonds, one N—HO and three C—HO, are observed in the structure. The molecules pack in a head-to-head and tail-to-tail fashion when viewed along the c axis, in alternating columns.
O and three C—HO, are observed in the structure. The molecules pack in a head-to-head and tail-to-tail fashion when viewed along the c axis, in alternating columns. metal-organic compoundsOpen access
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In the title compound, [Nb(CH3O)2(C5H7O2)Cl2], a slightly distorted octahedral coordination geometry is observed around the NbV atom with Nb—O distances in the range of 1.8254 (16)–2.0892 (16) Å and Nb—Cl distances of 2.3997 (14) and 2.4023 (12) Å. The O—Nb—O angles vary between 81.36 (7) and 172.65 (7) °, while the trans Cl—Nb—Cl angle is 167.34 (2)°. There are no hydrogen bonds observed.
