Structural, Magnetic, and Spectroscopic Characterization of the Pyridine Complexes of Copper(II) Triphenylacetate: A Dimeric Copper(II) Triphenylacetate–Pyridine Complex with Distorted Trigonal Bipyramidal Geometry Around Copper
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- Omar W Steward
- Department of Chemistry and Physics, Duquesne University
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- Michinobu Kato
- Department of Chemistry, Aichi Prefectural University
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- Shih-Chi Chang
- Department of Chemistry and Physics, Duquesne University
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- Martin Sax
- Biocrystallography Laboratory, V A Medical Center
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- Chong-Hwan Chang
- Biocrystallography Laboratory, V A Medical Center
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- C Frederick Jury
- Department of Chemistry and Physics, Duquesne University
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- Yoneichiro Muto
- Department of Chemistry, Faculty of Science and Engineering, Saga University
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- Tadashi Tokii
- Department of Chemistry, Faculty of Science and Engineering, Saga University
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- Toshiaki Taura
- Department of Chemistry, Aichi Prefectural University
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- James F Pletcher
- Biocrystallography Laboratory, V A Medical Center
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- Chung Soo Yoo
- Biocrystallography Laboratory, V A Medical Center
説明
<jats:title>Abstract</jats:title> <jats:p>The synthesis and characterization of three copper(II) triphenylacetate-pyridine complexes are reported along with their magnetic and spectral properties: [Cu2(O2CCPh3)4(py)2]·C6H6 (1), [Cu2(O2CCPh3)4(py)2] (2), and Cu(O2CCPh3)2·2py (3). Crystal structure analyses of 1 and 3 have revealed unusual geometries around copper: 1, triclinic, space group P\bar1 with a=19.558(7) b=16.605(6), c=14.997(5) Å, α=14.55(2)°, β=97.11(2)°, γ=111.65(2)°, and Z=2; 3, monoclinic, space group P21⁄c with a=8.931(1), b=12.602(1), c=19.578(1) Å, β=118.17(0.4)°, and Z=2. The coordination sphere around each copper in the dimeric complex 1 is a highly distorted trigonal bipyramid with bridging triphenylacetato ligands spanning the apical and equatorial positions, resulting in a long Cu–Cu distance of 3.086(1) Å. Temperature-dependent magntic susceptibility measurements on 1 indicate that the two coppers are antiferromagnetically coupled with −2J=187 cm−1. The structure of the monomeric complex 3 is unusual in that the out-of-plane carboxylate oxygen is twisted 12° from the normal. Two solid modifications are observed for 2. The magnetic and spectral properties of 2a (−2J=173 cm−1) resemble those of 1, and 2b (−2J=321 cm−1) those of copper(II) acetate monohydrate. Magneto-structural correlations are presented. The novel structural features of these complexes are suggested to arise from steric effects resulting from the spatial relationships both between and within the molecules in the crystal environment.</jats:p>
収録刊行物
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 64 (10), 3046-3058, 1991-10-01
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360283694080303360
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- NII論文ID
- 130001979253
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- ISSN
- 13480634
- 00092673
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