RESUMO
The Zn(II) ion in the title compound, [Zn(C(9)H(6)NO(4))(2)(H(2)O)(4)], is located on an inversion center and is octa-hedrally coordinated by two 2-(2-oxo-2,3-dihydro-1,3-benzoxazol-3-yl)acetate anions in axial sites and four water mol-ecules in equatorial positions. In the crystal, O-Hâ¯O hydrogen bonds between the coordinated water mol-ecules and carbon-yl-carboxyl-ate O atoms lead to pleated sheets parallel to (001).
RESUMO
In the title compound, (C(13)H(15)N(2)O)(2)[ZnCl(4)], also known as di(harmalinium) tetra-chloridozincate, the Zn(II) atom is in a distorted tetrahedral coordination of the chlorido ligands. In the cation, the meth-oxy and methyl groups are both coplanar with with rings to which they are attached [maximum deviations of 0.232â (4) and 0.259â (4)â Å, respectively]. In the crystal, the alkaloid cations and metal complex anions inter-act by way of N-Hâ¯Cl hydrogen bonds involving each Cl atom, resulting in a network structure.
RESUMO
The asymmetric unit of the title compound, C(22)H(18)N(2)O(2), contains two independent mol-ecules, which differ in the orientations of the benzyl groups with respect to the planar (r.m.s. deviations of 0.031 and 0.020â Å) quinazoline-2,4-dione skeletons [dihedral angles of 73.97â (4) and 70.07â (4)° in the first mol-ecule and 75.63â (4) and 63.52â (3)° in the second]. The crystal structure is stabilized by weak inter-molecular C-Hâ¯O and C-Hâ¯π interactions and aromatic π-π stacking inter-actions [centroid-centroid distance = 3.735â (2)â Å].
RESUMO
The title mixed-ligand oxidovanadium(IV) compound, [VO(C(5)H(7)O(2))(2)(C(8)H(9)N(3))], contains a V(IV) atom in a distorted octahedral coordination, which is typical for such complexes. The vanadyl group and the N-heterocyclic ligand are cis to each other. The coordination bond is located at the endocyclic N atom of the benzimidazole ligand. Intra-molecular hydrogen bonds between the exo-NH(2) group H atoms and acetyl-acetonate O atoms stabilize the crystal structure.
