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Title: [NH{sub 3}(CH{sub 2}){sub 2}NH{sub 3}][Co(SO{sub 4}){sub 2}(H{sub 2}O){sub 4}]: Chemical preparation, crystal structure, thermal decomposition and magnetic properties

Cobalt ethylenediammonium bis(sulfate) tetrahydrate, [NH{sub 3}(CH{sub 2}){sub 2}NH{sub 3}][Co(SO{sub 4}){sub 2}(H{sub 2}O){sub 4}], has been synthesised by slow evaporation at room temperature. It crystallises in the triclinic system, space group P1-bar, with the unit cell parameters: a = 6.8033(2), b 7.0705(2), c = 7.2192(3) A, {alpha} = 74.909(2){sup o}, {beta} = 72.291(2){sup o}, {gamma} = 79.167(2){sup o}, Z = 1 and V = 317.16(2) A{sup 3}. The Co(II) atom is octahedrally coordinated by four water molecules and two sulfate tetrahedra leading to trimeric units [Co(SO{sub 4}){sub 2}(H{sub 2}O){sub 4}]. These units are linked to each other and to the ethylenediammonium cations through OW-H...O and N-H...O hydrogen bonds, respectively. The zero-dimensional structure is described as an alternation between cationic and anionic layers along the crystallographic b-axis. The dehydration of the precursor proceeds through three stages leading to crystalline intermediary hydrate phases and an anhydrous compound. The magnetic measurements show that the title compound is predominantly paramagnetic with weak antiferromagnetic interactions.
Authors:
; ;  [1] ;  [2]
  1. Laboratoire de l'Etat Solide, Departement de Chimie, Faculte des Sciences de Sfax, BP 802, 3018 Sfax (Tunisia)
  2. Sciences Chimiques de Rennes (CNRS, UMR 6226), Groupe Materiaux Inorganiques: Chimie Douce et Reactivite, Universite de Rennes I, Avenue du General Leclerc, 35042 Rennes Cedex (France), E-mail: thierry.bataille@univ-rennes1.fr
Publication Date:
OSTI Identifier:
21143940
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 43; Journal Issue: 10; Other Information: DOI: 10.1016/j.materresbull.2007.10.024; PII: S0025-5408(07)00474-6; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMMONIUM COMPOUNDS; ANTIFERROMAGNETISM; CHEMICAL PREPARATION; COBALT SULFATES; CRYSTALLOGRAPHY; DEHYDRATION; HYDRATES; LAYERS; MAGNETIC PROPERTIES; PARAMAGNETISM; PYROLYSIS; SPACE GROUPS; TEMPERATURE RANGE 0273-0400 K; THERMAL GRAVIMETRIC ANALYSIS; TRICLINIC LATTICES; X-RAY DIFFRACTION