Polynuclear chromium(III) carboxlylates: Part 2. Chromium(III) acetate - What's in it?

Michal Eshel; Avi Bino

doi:10.1016/S0020-1693(01)00492-3

Polynuclear chromium(III) carboxlylates: Part 2. Chromium(III) acetate - What's in it?

Michal Eshel
, Avi Bino^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	127-132
Number of pages	6
Journal	Inorganica Chimica Acta
Volume	320
Issue number	1-2
DOIs	https://doi.org/10.1016/S0020-1693(01)00492-3
State	Published - 13 Aug 2001

Keywords

Carboxylates complexes
Chromium complexes
Crystal structures
Polynuclear complexes

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@article{74e96db712044674b65237fab13d2f69,

title = "Polynuclear chromium(III) carboxlylates: Part 2. Chromium(III) acetate - What's in it?",

abstract = "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.",

keywords = "Carboxylates complexes, Chromium complexes, Crystal structures, Polynuclear complexes",

author = "Michal Eshel and Avi Bino",

year = "2001",

month = aug,

day = "13",

doi = "10.1016/S0020-1693(01)00492-3",

language = "אנגלית",

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pages = "127--132",

journal = "Inorganica Chimica Acta",

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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

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SN - 0020-1693

VL - 320

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EP - 132

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

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ER -

Polynuclear chromium(III) carboxlylates: Part 2. Chromium(III) acetate - What's in it?

Abstract

Keywords

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