RESUMO
The title compound, [Cu(2)Fe(3)(C(5)H(5))(3)(C(2)H(3)O(2))(C(6)H(4)O(2))(3)(C(3)H(7)NO)(2)], belongs to the classic dimeric paddle-wheel structure type. It is an unusual example in that it contains two different carboxylate groups, viz. ferrocenecarboxylate and acetate. With three ferrocenecarboxylate groups and only one acetate group bridging the two Cu centres, a noncentrosymmetric molecular arrangement results.
RESUMO
The title complex, [Co(C(15)H(12)N(3)O(2)S)(2)], consists of an octahedrally coordinated Co(II) ion, with two crystallographically independent 1,4-dibenzoylthiosemicarbazidate ligands in a tridentate mer coordination [Co-O = 2.064 (3)-2.132 (3) A and Co-N = 2.037 (3)-2.043 (3) A]. There are intermolecular N-H...S hydrogen bonds involving one ligand and strong pi-pi stacking interactions involving the other ligand, resulting in a three-dimensional supramolecular framework. The hydrogen bonds and pi-pi interactions, as well as different intramolecular aryl-benzamide H-C...H(-N) distances, give rise to a difference in conformation between the two ligands.
Assuntos
Cobalto/química , Cristalografia por Raios X/métodos , Compostos Organometálicos/química , Carbono/química , Hidrogênio/química , Ligação de Hidrogênio , Ligantes , Modelos Químicos , Conformação Molecular , Estrutura Molecular , Nitrogênio/química , Probabilidade , Tiossemicarbazonas/químicaRESUMO
Two pseudo-polymorphic polymers, poly[ethylenediammonium [[aquacopper(II)]-micro(4)-benzene-1,2,4,5-tetracarboxylato] dihydrate], [(C(2)H(10)N(2))[Cu(C(10)H(2)O(8))(H(2)O)].2H(2)O](n), (I), and poly[ethylenediammonium [copper(II)-micro(4)-benzene-1,2,4,5-tetracarboxylato] 2.5-hydrate], [(C(2)H(10)N(2))[Cu(C(10)H(2)O(8))].2.5H(2)O](n), (II), contain two-dimensional anionic layers, ethylenediammonium (H(2)en) cations acting as counter-ions and free water molecules. Although the topological structures of the two anionic layers are homologous, the coordination environments of the Cu(II) centres are different. In (I), the Cu(II) centre, sitting on a general position, has a square-pyramidal environment. The two independent benzene-1,2,4,5-tetracarboxylate (btc) anions rest on centres of inversion. The Cu(II) cation in (II) is located on a twofold axis in a square-planar coordination. The H(2)en cation is on an inversion centre and the btc ligand is split by a mirror plane. Extensive hydrogen-bonding interactions between the complexes, H(2)en cations and water molecules lead to the formation of three-dimensional supramolecular structures.