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From: | Rosalie Harper |
Subject: | [Bug-paperclips] flawed bunk bed |
Date: | Thu, 19 Oct 2006 13:14:41 +0300 |
User-agent: | Thunderbird 0.7 (Windows/20040616) |
One of the six-membered rings adopts a screw-boat conformation, one adopts an envelope conformation and the third is planar. N hydrogen-bonding interactions contribute to the stability of the structure. The pyrazole ring is in an envelope conformation. N hydrogen bonds, leading to a chain structure. O hydrogen bonds to form centrosymmetric hydrogen-bonded dimers. N hydrogen bonds together with weak N. The structure consists of chains running along the a axis. The crystals were found to be twinned. The are two molecules in the asymmetric unit. O hydrogen bonds that link adjacent molecules into one-dimensional extended chains. The CdII ion and the phenanthroline ligand are positioned on a twofold axis. I edges, thus giving rise to a polymeric chain along the c axis. The triazole ring is almost coplanar with the pyrimidine ring. O hydrogen bonds are observed. A three-dimensional supramolecular architecture is formed via hydrogen-bond interactions. The two symmetry-independent Co atoms show a cis-octahedral coordination. The Ni atom lies on a centre of symmetry. I edges, thus giving rise to a polymeric chain along the c axis. O hydrogen bonds link adjacent complex molecules via the uncoordinated water molecules into a three-dimensional network architecture. The structure consists of chains running along the a axis. N hydrogen bonds together with weak N. O hydrogen bonds that link adjacent molecules into one-dimensional extended chains. Each ligand provides one O atom and one N atom. O hydrogen bonds link the molecules, forming a network, which may be effective in the stabilization of the crystal structure. O hydrogen bond involving the NH imine H atom and the phenolate O atom. There is a centre of symmetry at the centre of each cation ring. The sandine framework consists of two five- and three six-membered condensed rings. O hydrogen bonds to form layers. |
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