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Perdih F.,University of Ljubljana | Perdih F.,CO EN FIST
Journal of Coordination Chemistry | Year: 2012

Three copper(II) bis(pentane-2,4-dionato- 2 O,O) compounds with 2-amino-3-methylpyridine (2,3-ampy) (1), 2-amino-5-methylpyridine (2,5-ampy) (2), and 2-amino-4-methylpyridine (2,4-ampy) (3) were prepared by reaction of bis(pentane-2,4-dionato- 2 O,O)copper(II) with selected methyl substituted 2-aminopyridines. The coordination of Cu(II) in all three compounds is square pyramidal and intramolecular N-HO hydrogen-bonding is present. X-ray crystallographic studies reveal different crystal aggregation influenced by a methyl substituent on pyridine. No intermolecular N-HO hydrogen-bonding is present in 1. Intermolecular N-HO hydrogen-bonding in 2 forms infinite chains and dimers are formed in 3. Extended 3-D aggregation was found in 2 via-and C-H (arene) interactions, while only chain formation was found in 1 and 3. © 2012 Copyright Taylor and Francis Group, LLC. Source


The influence of the introduced fluorine atoms to diketonato backbone exerted on the crystal packing was studied on cobalt(II) bis(4,4,4-trifluoro-1- phenylbutane-1,3-dionato-κ 2 O,O′) compounds with pyridine (1), 2,2′-bipyridine (2) and 1,10-phenanthroline (4), and cobalt(II) bis(benzoylacetonato-κ 2 O,O′) compound with 2,2′-bipyridine (3). The solid-state structures of 1-4 were determined by single crystal X-ray analysis. The coordination of Co(II) is octahedral in all four compounds. The differences in crystal packing of 1 with regard to the known complexes with non-fluorinated analogue and 4,4,4-trifluoro-1-(4-fluorophenyl) butane-1,3-dionate were observed. Unit cell parameters of 2·1/2C 7H8 and 3·1/2C7H8 slightly differ, but they have similar crystal packing dominated by the π-π interactions. Strong π-π interactions and weak C- H···π(arene) and C-F···π(arene) interactions are present in 2-4, while no significant intermolecular interactions are present in 1. © 2013 Springer Science+Business Media New York. Source


Perdih F.,University of Ljubljana | Perdih F.,CO EN FIST
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, [Al(C5H6ClO2) 3], the AlIII cation is situated on a twofold rotation axis and is coordinated by six O atoms from three 3-chloropentane-2,4-dionate ligands in an octahedral environment. Al - O bond lengths are in the range 1.8741 (14)-1.8772 (14) Å. In the crystal, molecules are linked via C - H⋯Cl contacts. Source


Perdih F.,University of Ljubljana | Perdih F.,CO EN FIST
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, [Fe(C5H6ClO2) 3], the FeIII cation is situated on a twofold rotation axis and is coordinated by six O atoms from three 3-chloropentane-2,4-dionate ligands in a slightly distorted octahedral environment. Fe - O bond lengths are in the range 1.9818 (18)-1.9957 (18) Å. The trans O - Fe - O angles are 169.06 (13) and 171.54 (8)°, whereas the corresponding cis angles are in the range 84.81 (10)-100.68 (12)°. In the crystal, molecules are linked via C - H⋯Cl interactions. Source


Perdih F.,University of Ljubljana | Perdih F.,CO EN FIST
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the crystal structure of the title 1:1 co-crystal, C6H 7N2O+·C2Cl3O 2 -·C6H6N2O, the amide groups of the 4-carbamoylpyridin-1-ium ion and the isonicotinamide molecule are twisted out of the plane of the aromatic ring with C - C - C - N torsion angles of 21.5 (4) and -33.5 (4)°, respectively. The 4-carbamoylpyridin-1-ium and isonicotinamide amide groups form R 2 2(8) hydrogen-bonded dimers via N - H⋯O=C interactions. The two remaining amide H atoms (i) link dimers via the cation to an isonicotinamide and (ii) from the isonicotinamide to a trichloro-acetate anion. The pyridinium H atom also forms an N - H⋯O hydrogen bond with the trichloro-acetate anion. Due to the extended hydrogen bonding, including C - H⋯O and C - H⋯Cl interactions, all components in the structure aggregate into a three-dimensional supra-molecular framework. Source

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