ABSTRACT
In the title compound, C17H18N4O5·0.47CH3OH, the virtually planar (r.m.s. deviation = 0.128â Å) carbonohydrazide mol-ecule is located on a twofold axis and conformation of its C=N bonds is E. There are short intra-molecular O-Hâ¯N hydrogen bonds between the hy-droxy groups and hydrazide N atoms. In the crystal, bifurcated N-Hâ¯(O,O) hydrogen bonds assemble the carbonohydrazide mol-ecules into a three-dimensional network. There are C 2 symmetric voids in this network, 47% of which are occupied by disordered methanol mol-ecules.
ABSTRACT
The title complex, [Cu(SO4)(C13H13N3)(H2O)]·4H2O, was obtained by mixing copper sulfate penta-hydrate and 2-(pyridin-2-yl)-N-(pyridin-2-yl-methyl-idene)ethanamine in eth-anol under reflux conditions. The Cu(II) ion shows a Jahn-Teller-distorted octa-hedral geometry, with equatorial positions occupied by three N atoms from the tridentate ligand (average Cu-N = 2.004â Å) and one O atom from a bidentate sulfate anion [Cu-O = 1.963â (2)â Å]. The axial positions are occupied by one O atom from a coordinating water mol-ecule [Cu-O = 2.230â (3)â Å] and one weakly bonded O atom [Cu-O = 2.750â (2)â Å] from the bidentate sulfate ion. The complex mol-ecules are connected through O-Hâ¯O hydrogen bonds between the coordinating water mol-ecules and sulfate ions from neighboring complexes, forming a double chain parallel to the c axis. The chains are stabilized through additional hydrogen bonds by one of the non-coordinating water mol-ecules bridging between neighboring strands of the double chains. The remaining three water mol-ecules fill the inter-stitial space between the double chains and are involved in an intricate hydrogen-bonding network that consolidates the structure.
ABSTRACT
In the title compound, [Co(C(16)H(19)N(2)O(2))(2)]NO(3)·H(2)O, the Co(III) ion is located on an inversion center and is six-coordinated by two phenolate O atoms and four amino N atoms from two diamine ligands, forming an octa-hedral geometry. The water mol-ecule and the nitrate anion are located close to an inversion center, and are thus equally disordered by symmetry. The crystal packing is stabilized by inter-molecular O-Hâ¯O hydrogen bonds involving the uncoordinated water mol-ecule and the free phenol hydroxyl group with the nitrate anion. N-Hâ¯O hydrogen bonds involving the amino groups and the nitrate anions connect the complex mol-ecules along the c axis.
ABSTRACT
The title mol-ecular structure, namely, di-aqua-tris-(µ3-1,3-bis-{[1-(2-oxidophen-yl)ethyl-idene]amino}-propan-2-olato)-µ3-hydroxido-dinitrato-hexa-copper(II) ethanol tris-olvate, [Cu6(C19H19N2O3)3(NO3)2(OH)(H2O)2]·3C2H5OH, corres-ponds to a non-symmetric hexa-nuclear copper complex. The complex exhibits one core in which three CuII metal centres are mutually inter-connected, two by two, via three phenolato oxygen anions acting in a µ2-mode. These three copper cations are inter-connected in a µ3-mode by one hydroxyl group. An open-cube structure is generated in which each of the CuII cations of the three CuO4N units is connected by two µ2-O anions from phenolate groups and one µ3-O atom from a hy-droxy anion. Each of the three penta-coordinated CuII cations situated in the open-cube unit has a distorted NO4 square-pyramidal environment. Each of these three CuII centres is inter-connected with another CuII cation via one enolate O atom in µ2-mode, yielding one CuNO4 unit and two CuNO3 units. The penta-coordinated CuII atom has a distorted square-pyramidal environment while the two tetra-coordinated copper(II) cations are situated in a square-planar environment. A series of intra-molecular O-Hâ¯O hydrogen bonds are observed. In the crystal, the units are connected two by two by inter-molecular C-Hâ¯O and O-Hâ¯O hydrogen bonds, thus forming sheets parallel to the ac plane.
ABSTRACT
In the mol-ecule of the title compound, C(22)H(26)N(4)O(4)S(2), the central O-CH(2)-CH(2)-O chain adopts a synclinal conformation [torsion angle = 65.0â (2)°]. The crystal structure is stabilized by intra-molecular N-Hâ¯O=C and inter-molecular N-Hâ¯O-C hydrogen bonds.