RESUMO
In the title compound, [Zr(C(11)H(10)NO)(4)]·2C(3)H(7)NO, the Zr(IV) ion is coordinated by four bidentate 5,7-dimethylquinolin-8-olate ligands in a slightly distorted square-anti-prismatic coordination environment. The asymmetric unit also contains two N,N'-dimethyl-formamide (DMF) solvent mol-ecules. In the crystal, a weak C-Hâ¯O hydrogen bond links the complex mol-ecule to a solvent mol-ecule and weak π-π stacking inter-actions [centroid-centroid distance = 3.671â (3)â Å] also occur. One of the DMF solvent mol-ecules was refined as disordered over three sets of sites, with refined occupancies in the ratio of 0.391â (9):0.342â (10):0.267â (7).
RESUMO
In the title compound, [Zr(C(6)H(4)NO(2))(4)]·2H(2)O, the Zr(IV) atom is located on a crystallographic fourfold rotoinversion axis ([Formula: see text]) and is coordinated by four picolinate anions with Zr-O and Zr-N distances of 2.120â (2) and 2.393â (2)â Å, respectively. An approximate square-anti-prismatic coordination polyhedron of the N,O-coordination ligand atoms is formed, with a distortion towards dodeca-hedral geometry. The crystal packing is stabilized by inter-molecular π-π inter-actions between adjacent picolinate rings [centroid-centroid distances = 3.271â (1) and 3.640â (2)â Å], as well as O-Hâ¯O hydrogen bonds between the solvent mol-ecules and the coordinated ligands, thereby linking the mol-ecules into a supra-molecular three-dimensional network.
RESUMO
The binuclear title compound, [Hf(2)(C(5)HF(6)O(2))(6)(OH)(2)]·C(3)H(6)O, contains an Hf(IV) atom which is eight coordinated and surrounded by three chelating ß-diketonato 1,1,1,5,5,5-hexa-fluoro-acetyl-acetonate (hfaa) ligands and two bridging OH groups situated on a twofold rotation axis. The HfO(8) coordination polyhedron shows a slightly distorted Archimedean square anti-prismatic coordination with average Hf-O, C-O, C-C(Me) distances of 2.19â (2), 1.26â (2) and 1.49â (2)â Å, respectively, and an O-Hf-O bite angle of 75.3â (5)°. Weak O-Hâ¯O hydrogen bonding inter-actions are observed between one of the bridging hydr-oxy groups and the disordered solvent mol-ecule.
RESUMO
In the title compound, [Hf(C(9)H(6)NO)(4)]·2C(7)H(8), the hafnium metal centre is coordinated by four N,O-donating bidentate quinolin-8-olate ligands arranged to give a square-anti-prismatic coordination polyhedron with a slightly distorted dodeca-hedral geometry. The average Hf-O and Hf-N distances are 2.096â (3) and 2.398â (3)â Å, respectively, and the average O-Hf-N bite angle is 70.99â (11)°. The crystal packing is controlled by π-π inter-actions between quinoline ligands of neighbouring mol-ecules and hydrogen-bonding inter-actions. The inter-planar distances vary between 3.138â (1) and 3.208â (2)â Å, while the centroid-centroid distances range from 3.576â (1) to 4.074â (1)â Å.
RESUMO
In the title compound, [Zr(C(5)H(4)F(3)O(2))(4)]·C(7)H(8), the Zr atom is in a square-anti-prismatic coordination geometry that comprises four O,O'-bidentate trifluoro-acetyl-acetonate ligands. The O-Zr-O bite angles of the acetonate ligands range from 75.27â (5) to 75.41â (5)°. The Zr atom is located on a twofold rotation axis.