Preparation, crystal structure, spectroscopic and magnetic characterisation of acetatobis(di-2-pyridylamine)copper(II) tetrafluoroborate and μ-carbonato-tetrakis(di-2-pyridylamine) dicopper(II) bistetrafluoroborate tetrahydrate
| Autor: | Wasit Somjitsripunya, Kandasamy Chinnakali, Chaveng Pakawatchai, Sujittra Youngme, Hoong-Kun Fun |
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| Rok vydání: | 2000 |
| Předmět: |
Denticity
Tetrahydrate Chemistry Ligand Inorganic chemistry chemistry.chemical_element Crystal structure Chromophore Copper Square pyramidal molecular geometry Inorganic Chemistry Copper(II) tetrafluoroborate chemistry.chemical_compound Crystallography Materials Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Inorganica Chimica Acta. 303:181-189 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/s0020-1693(00)00032-3 |
| Popis: | The crystal structures of [Cu(dpyam)2(O2CCH3)][BF4] (1) and [Cu2(dpyam)4(CO3)][BF4]2·4H2O (2) have been determined by X-ray analysis. 1 involves the distortion of the CuN4O2 chromophore towards a square pyramidal (4+1+1*) stereochemistry which is best described as involving a square-pyramidal distorted octahedral stereochemistry of the six-coordinate CuN4OO′ chromophore. Compound 2 has a dinuclear cation with five-coordinate copper(II) ions bridged asymmetrically by a bidentate carbonate ligand. Both copper(II) ions predominantly involve the distorted square-pyramidal (4+1) stereochemistry of the CuN3ON′ chromophore. The polycrystalline ESR spectra of 1 and 2 are exchange coupled and temperature independent. In 2 the room temperature effective magnetic moment of 1.34 μB indicates the partial spin pairing by antiferromegnetic coupling. |
| Databáze: | OpenAIRE |
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