TY - JOUR
T1 - Polynuclear chromium(III) carboxlylates
T2 - Part 2. Chromium(III) acetate - What's in it?
AU - Eshel, Michal
AU - Bino, Avi
PY - 2001/8/13
Y1 - 2001/8/13
N2 - Chromium(III) acetate has been widely used in industry for decades. The commercial material is an ill-defined substance, which represents a large number of compounds having different compositions, physical properties and appearances. Several samples of Cr(III) acetate, from various commercial sources were examined by ion-exchange chromatography. All the samples were found to contain several species such as [Cr3O(O2CCH3)6(H2O) 3]+ and other positively charged purple complexes. They also contain various amounts of the neutral violet complex [Cr8(OH)8(O2CCH3)16] (1) which crystallizes upon slow evaporation of its aqueous solution. 1 is a cyclic octanuclear complex with hydroxo and acetate ligands bridging the adjacent Cr(III) ions. The structure of a well-defined Cr(III) acetate, namely, [Cr(H2O)6](O2CCH3)3 (2) has been determined crystallographically and its decomposition products were examined by ion-exchange chromatography. Compound 2 decomposes under ambient conditions, releasing acetic acid and water producing neutral and charged polynuclear Cr(III) complexes.
AB - Chromium(III) acetate has been widely used in industry for decades. The commercial material is an ill-defined substance, which represents a large number of compounds having different compositions, physical properties and appearances. Several samples of Cr(III) acetate, from various commercial sources were examined by ion-exchange chromatography. All the samples were found to contain several species such as [Cr3O(O2CCH3)6(H2O) 3]+ and other positively charged purple complexes. They also contain various amounts of the neutral violet complex [Cr8(OH)8(O2CCH3)16] (1) which crystallizes upon slow evaporation of its aqueous solution. 1 is a cyclic octanuclear complex with hydroxo and acetate ligands bridging the adjacent Cr(III) ions. The structure of a well-defined Cr(III) acetate, namely, [Cr(H2O)6](O2CCH3)3 (2) has been determined crystallographically and its decomposition products were examined by ion-exchange chromatography. Compound 2 decomposes under ambient conditions, releasing acetic acid and water producing neutral and charged polynuclear Cr(III) complexes.
KW - Carboxylates complexes
KW - Chromium complexes
KW - Crystal structures
KW - Polynuclear complexes
UR - http://www.scopus.com/inward/record.url?scp=0035855290&partnerID=8YFLogxK
U2 - 10.1016/S0020-1693(01)00492-3
DO - 10.1016/S0020-1693(01)00492-3
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AN - SCOPUS:0035855290
SN - 0020-1693
VL - 320
SP - 127
EP - 132
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1-2
ER -