metal-organic compounds
The crystal structure of the title compound, [Nd(C4H9NO)4(H2O)4][Fe(CN)6]·3H2O, contains two isolated mononuclear ions connected through hydrogen bonding between a water molecule bonded to neodymium(III) and a cyano group bonded to iron(III). The coordination of the six cyano groups around iron(III) is close to ideal octahedral, while the eight ligands around neodymium(III) comprise a slightly distorted square antiprism. Three solvent water molecules are included in the asymmetric unit and hydrogen bonding is abundant, creating an extended network. Three of the four dimethylacetamide (DMA) molecules bonded to Nd have various degrees of common structural disorder.
metal-organic compounds
In the title compound, [Cu2(C7H8O3)2(C5H5N)2], each centrosymmetric molecule contains two square-pyramidally coordinated Cu atoms connected to two O atoms from each of the two diacetylacetonate anions. The Cu atoms and the two diacetylacetonate anions are approximately coplanar, and the pyramidal coordination of Cu is completed by pyridine ligands, which coordinate to the two metals on opposite sides of this plane.
metal-organic compounds
The crystal structure of the title compound, {[Gd2(C8H4O4)3(C5H11NO)2]·H2O}n, consists of chains of Gd atoms interconnected by a benzene-1,4-dicarboxylate (BDC) linker. The chains are also intraconnected by carboxylate groups from the BDC linker, thus generating a three-dimensional framework with large cavities. The coordination of the eight carboxylate O atoms around the GdIII ion is distorted dodecahedral, due to the steric constraints of the carboxylate groups. The large anisotropic displacement parameters of the atoms of the coordinated diethylformamide (DEF) and the disorder in their positions indicate loose bonding to the framework, and hence solvent exchange may be possible. Additionally, one water molecule is located in the cavity.
metal-organic compounds
The crystal structure of the title compound, [Gd(C14H8O4)1.5(C5H11NO)]n, comprises chains of Gd atoms intraconnected by the carboxylate groups of the biphenyl-4,4′-dicarboxylate (BPDC) linkers, one of which is disposed about a twofold axis. The Gd atom chains are aligned along the b axis and are interconnected by BPDC linkers, creating a three-dimensional framework. A single diethylformamide (DEF) molecule is bonded to each Gd atom. This molecule is positioned in the cavities formed by the interconnection of the Gd atom chains via the BPDC linkers. Due to the steric constraints of the carboxylate groups, the square antiprismatic coordination geometry of eight O atoms (one from the DEF molecule and seven from carboxylate groups) around Gd is distorted.