Synthesis and crystal structures of the chromium(II) and chromium(III) hexafluoroacetylacetonate complexes trans-Cr(hfac)2(thf)2 and Cr(hfac)3

Yoshiko Harada; Gregory S. Girolami

doi:10.1016/j.poly.2006.12.007

Synthesis and crystal structures of the chromium(II) and chromium(III) hexafluoroacetylacetonate complexes trans-Cr(hfac)₂(thf)₂ and Cr(hfac)₃

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Abstract

Treatment of a tetrahydrofuran solution of CrCl₂(thf) with Na(hfac), hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, followed by crystallization from diethyl ether, affords the six-coordinate chromium(II) complex Cr(hfac)₂(thf)₂. The crystal structures of Cr(hfac)₂(thf)₂ and the chromium(III) complex Cr(hfac)₃ have been determined by single-crystal X-ray diffraction. Cr(hfac)₂(thf)₂ adopts a trans octahedral geometry, in which the Cr-O(hfac) and Cr-O(thf) distances are 1.936(3) and 2.019(6) Å, respectively. Cr(hfac)₃ is an octahedral compound with a Cr-O distance of 1.943(5) Å. Structural comparisons with related molecules are given.

Original language	English (US)
Pages (from-to)	1758-1762
Number of pages	5
Journal	Polyhedron
Volume	26
Issue number	8
DOIs	https://doi.org/10.1016/j.poly.2006.12.007
State	Published - May 21 2007

Keywords

Chromic complex
Chromium
Chromous complex
Diketonate complexes
Hexafluoroacetylacetonate
Twinned
Twinning
X-ray crystal structure

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Online availability

10.1016/j.poly.2006.12.007

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Cite this

@article{150da0d833954e7d918969544e80c0db,

title = "Synthesis and crystal structures of the chromium(II) and chromium(III) hexafluoroacetylacetonate complexes trans-Cr(hfac)2(thf)2 and Cr(hfac)3",

abstract = "Treatment of a tetrahydrofuran solution of CrCl2(thf) with Na(hfac), hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, followed by crystallization from diethyl ether, affords the six-coordinate chromium(II) complex Cr(hfac)2(thf)2. The crystal structures of Cr(hfac)2(thf)2 and the chromium(III) complex Cr(hfac)3 have been determined by single-crystal X-ray diffraction. Cr(hfac)2(thf)2 adopts a trans octahedral geometry, in which the Cr-O(hfac) and Cr-O(thf) distances are 1.936(3) and 2.019(6) {\AA}, respectively. Cr(hfac)3 is an octahedral compound with a Cr-O distance of 1.943(5) {\AA}. Structural comparisons with related molecules are given.",

keywords = "Chromic complex, Chromium, Chromous complex, Diketonate complexes, Hexafluoroacetylacetonate, Twinned, Twinning, X-ray crystal structure",

author = "Yoshiko Harada and Girolami, {Gregory S.}",

note = "Funding Information: We thank Rosann Bish for carrying out some of the early stages of the synthetic work, and Dr. Scott Wilson and Ms. Teresa Prussak-Wieckowska for collecting the crystallographic data. We thank the Department of Energy (Grant DEFG02-91-ER45439) for support of this work. ",

year = "2007",

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doi = "10.1016/j.poly.2006.12.007",

language = "English (US)",

volume = "26",

pages = "1758--1762",

journal = "Polyhedron",

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publisher = "Elsevier Limited",

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T1 - Synthesis and crystal structures of the chromium(II) and chromium(III) hexafluoroacetylacetonate complexes trans-Cr(hfac)2(thf)2 and Cr(hfac)3

AU - Harada, Yoshiko

AU - Girolami, Gregory S.

N1 - Funding Information: We thank Rosann Bish for carrying out some of the early stages of the synthetic work, and Dr. Scott Wilson and Ms. Teresa Prussak-Wieckowska for collecting the crystallographic data. We thank the Department of Energy (Grant DEFG02-91-ER45439) for support of this work.

PY - 2007/5/21

Y1 - 2007/5/21

N2 - Treatment of a tetrahydrofuran solution of CrCl2(thf) with Na(hfac), hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, followed by crystallization from diethyl ether, affords the six-coordinate chromium(II) complex Cr(hfac)2(thf)2. The crystal structures of Cr(hfac)2(thf)2 and the chromium(III) complex Cr(hfac)3 have been determined by single-crystal X-ray diffraction. Cr(hfac)2(thf)2 adopts a trans octahedral geometry, in which the Cr-O(hfac) and Cr-O(thf) distances are 1.936(3) and 2.019(6) Å, respectively. Cr(hfac)3 is an octahedral compound with a Cr-O distance of 1.943(5) Å. Structural comparisons with related molecules are given.

AB - Treatment of a tetrahydrofuran solution of CrCl2(thf) with Na(hfac), hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, followed by crystallization from diethyl ether, affords the six-coordinate chromium(II) complex Cr(hfac)2(thf)2. The crystal structures of Cr(hfac)2(thf)2 and the chromium(III) complex Cr(hfac)3 have been determined by single-crystal X-ray diffraction. Cr(hfac)2(thf)2 adopts a trans octahedral geometry, in which the Cr-O(hfac) and Cr-O(thf) distances are 1.936(3) and 2.019(6) Å, respectively. Cr(hfac)3 is an octahedral compound with a Cr-O distance of 1.943(5) Å. Structural comparisons with related molecules are given.

KW - Chromic complex

KW - Chromium

KW - Chromous complex

KW - Diketonate complexes

KW - Hexafluoroacetylacetonate

KW - Twinned

KW - Twinning

KW - X-ray crystal structure

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