A copper(II)-pyrazole complex cation with 3̄ imposed symmetry

Tom Otieno; Jaime R. Blanton; M. Jason Hatfield; Sherry L. Asher; Sean Parkin

doi:10.1107/S010827010200152X

A copper(II)-pyrazole complex cation with 3̄ imposed symmetry

Tom Otieno, Jaime R. Blanton, M. Jason Hatfield, Sherry L. Asher, Sean Parkin

Chemistry

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

11 Scopus citations

Abstract

The reaction of Cu(ClO₄)₂·6H₂O, NaAsF₆ and excess pyrazole yields hexakis(pyrazole-κN²)copper(II) bis(hexafluoroarsenate), [Cu(C₃H₄N₂)₆] (AsF₆)₂ or [Cu(pzH)₆](AsF₆)₂ (pzH is pyrazole), (I). The analogous hexakis(pyrazole-κN²)copper(II) hexafluorophosphate perchlorate complex, [Cu(C₃H₄N₂)₆] (PF₆)_1.29(ClO₄)_0.71 or [Cu(pzH)₆](PF₆)_1.29 (ClO₄)_0.71, (II), is obtained in a similar fashion, using KPF₆ in place of NaAsF₆. Both compounds contain the hitherto unknown [Cu(pzH)₆]²⁺ complex cation, in which the copper(II) ion lies at the center of a regular octahedron of coordinated N atoms. The cation has crystallographically imposed 3̄ symmetry. The X-ray data indicate that the lack of the expected distortion can be accounted for by the presence of either static Jahn-Teller disorder or dynamic Jahn-Teller distortion.

Original language	English
Pages (from-to)	m182-m185
Journal	Acta Crystallographica Section C: Crystal Structure Communications
Volume	58
Issue number	3
DOIs	https://doi.org/10.1107/S010827010200152X
State	Published - Mar 2002

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Biochemistry, Genetics and Molecular Biology (all)

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@article{9e56160f5a26475baa37042518bd9a3c,

title = "A copper(II)-pyrazole complex cation with {\=3} imposed symmetry",

abstract = "The reaction of Cu(ClO4)2·6H2O, NaAsF6 and excess pyrazole yields hexakis(pyrazole-κN2)copper(II) bis(hexafluoroarsenate), [Cu(C3H4N2)6] (AsF6)2 or [Cu(pzH)6](AsF6)2 (pzH is pyrazole), (I). The analogous hexakis(pyrazole-κN2)copper(II) hexafluorophosphate perchlorate complex, [Cu(C3H4N2)6] (PF6)1.29(ClO4)0.71 or [Cu(pzH)6](PF6)1.29 (ClO4)0.71, (II), is obtained in a similar fashion, using KPF6 in place of NaAsF6. Both compounds contain the hitherto unknown [Cu(pzH)6]2+ complex cation, in which the copper(II) ion lies at the center of a regular octahedron of coordinated N atoms. The cation has crystallographically imposed {\=3} symmetry. The X-ray data indicate that the lack of the expected distortion can be accounted for by the presence of either static Jahn-Teller disorder or dynamic Jahn-Teller distortion.",

author = "Tom Otieno and Blanton, {Jaime R.} and Hatfield, {M. Jason} and Asher, {Sherry L.} and Sean Parkin",

year = "2002",

month = mar,

doi = "10.1107/S010827010200152X",

language = "English",

volume = "58",

pages = "m182--m185",

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T1 - A copper(II)-pyrazole complex cation with 3̄ imposed symmetry

AU - Otieno, Tom

AU - Blanton, Jaime R.

AU - Hatfield, M. Jason

AU - Asher, Sherry L.

AU - Parkin, Sean

PY - 2002/3

Y1 - 2002/3

N2 - The reaction of Cu(ClO4)2·6H2O, NaAsF6 and excess pyrazole yields hexakis(pyrazole-κN2)copper(II) bis(hexafluoroarsenate), [Cu(C3H4N2)6] (AsF6)2 or [Cu(pzH)6](AsF6)2 (pzH is pyrazole), (I). The analogous hexakis(pyrazole-κN2)copper(II) hexafluorophosphate perchlorate complex, [Cu(C3H4N2)6] (PF6)1.29(ClO4)0.71 or [Cu(pzH)6](PF6)1.29 (ClO4)0.71, (II), is obtained in a similar fashion, using KPF6 in place of NaAsF6. Both compounds contain the hitherto unknown [Cu(pzH)6]2+ complex cation, in which the copper(II) ion lies at the center of a regular octahedron of coordinated N atoms. The cation has crystallographically imposed 3̄ symmetry. The X-ray data indicate that the lack of the expected distortion can be accounted for by the presence of either static Jahn-Teller disorder or dynamic Jahn-Teller distortion.

AB - The reaction of Cu(ClO4)2·6H2O, NaAsF6 and excess pyrazole yields hexakis(pyrazole-κN2)copper(II) bis(hexafluoroarsenate), [Cu(C3H4N2)6] (AsF6)2 or [Cu(pzH)6](AsF6)2 (pzH is pyrazole), (I). The analogous hexakis(pyrazole-κN2)copper(II) hexafluorophosphate perchlorate complex, [Cu(C3H4N2)6] (PF6)1.29(ClO4)0.71 or [Cu(pzH)6](PF6)1.29 (ClO4)0.71, (II), is obtained in a similar fashion, using KPF6 in place of NaAsF6. Both compounds contain the hitherto unknown [Cu(pzH)6]2+ complex cation, in which the copper(II) ion lies at the center of a regular octahedron of coordinated N atoms. The cation has crystallographically imposed 3̄ symmetry. The X-ray data indicate that the lack of the expected distortion can be accounted for by the presence of either static Jahn-Teller disorder or dynamic Jahn-Teller distortion.

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JO - Acta Crystallographica Section C: Crystal Structure Communications

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IS - 3

ER -

A copper(II)-pyrazole complex cation with 3̄ imposed symmetry

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