Crystal and molecular structures of the 4-(1H)-pyridone (=L) lanthanide complexes [l brace][GdL(NO[sub 3])[sub 3](H[sub 2]O)][center dot]CH[sub 3]OH[r brace][sub 2] and [DyL[sub 4](NO[sub 3])[sub 2]](NO[sub 3]) and of L[sub 2]HNO[sub 3]
- Imperial College of Science, London (United Kingdom)
The crystal structures of the title compounds have been determined by single crystal diffraction methods. Crystals of the dysprosium compound are monoclinic, space group P2[sub 1]/c with a = 14.133(4), b = 13.438(5), c = 14.401(4) [Angstrom], [beta] = 103.98(2)[degrees], V = 2654(1) [Angstrom][sup 3], Z = 4, D[sub c] = 1.82 g cm[sup [minus]3], final R = 0.035. The Dy atom is eight-coordinate with a distorted dodecahedral coordination geometry involving two bidentate nitrate groups and four pyridone oxygen atoms. An erbium complex with analogous stoichiometry was also prepared but not structurally characterized. Crystals of the Gd compound are monoclinic, space group P2[sub 1]/n, with a = 11.226(2), b = 9.075(2), c = 16.737(3) [Angstrom], [beta] = 93.88(3)[degrees], V = 1701(1) [Angstrom][sup 3], Z = 2, D[sub c] = 1.91 g cm[sup [minus]3], final R = 0.042. Each Gd atom is bonded to one pyridone oxygen atom, a water molecule and three bidentate nitrate groups. An oxygen atom of one of the bidentate nitrates additionally serves to bridge pairs of Gd atoms so as to form a dinuclear complex in which each Gd atom is nine-coordinate with a tricapped trigonal prismatic geometry. Crystals of L[sub 2]HNO[sub 3] are monoclinic, space group I2/a with a = 12.479(4), b = 6.535(2), c = 14.297(6) [Angstrom], [beta] = 96.07(3)[degrees], V = 1159(1) [Angstrom][sup 3], Z = 4, D[sub c] = 1.45 g cm[sup [minus]3], final R = 0.057. The pyridones are linked in pairs by very short (2.44 [Angstrom]) symmetrical O[center dot][center dot][center dot]H[center dot][center dot][center dot]O hydrogen bonds. Each pair is further linked via a nitrate ion by means of N-H[center dot][center dot][center dot]O(nitrate)[center dot][center dot][center dot]H-N hydrogen bonds, so as to form an extended chevron-like pyridone-pyridone-nitrate-pyridone-pyridone array. Adjacent chains are linked via weak C-H[center dot][center dot][center dot]O(NO[sub 3]) interactions. 5 refs., 7 figs., 7 tabs.
- OSTI ID:
- 6323204
- Journal Information:
- Journal of Crystallographic and Spectroscopic Research; (United States), Vol. 23:5; ISSN 0277-8068
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DYSPROSIUM COMPLEXES
CRYSTAL STRUCTURE
MOLECULAR STRUCTURE
GADOLINIUM COMPLEXES
CRYSTALS
DIFFRACTION METHODS
ERBIUM COMPLEXES
LATTICE PARAMETERS
LIGANDS
METHANOL
MONOCLINIC LATTICES
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
STOICHIOMETRY
ALCOHOLS
COMPLEXES
CRYSTAL LATTICES
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
RARE EARTH COMPLEXES
400201* - Chemical & Physicochemical Properties