Journal
JOURNAL OF STRUCTURAL CHEMISTRY
Volume 51, Issue 2, Pages 288-295Publisher
SPRINGER
DOI: 10.1007/s10947-010-0044-9
Keywords
Ni(II); Pd(II) and Cu(II) complexes; 1,2-bis(5,5,5-trifluoro-4-oxopent-2-en-2-amino)benzene; synthesis; X-ray crystallography
Funding
- State Support for Leading Scientific Schools [NSh-3758.2008.3]
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A new fluorine-containing tetradentate ligand 1,2-bis(5,5,5-trifluoro-4-oxopent-2-en-2-amino)benzene and its complexes with Ni(II), Pd(II) and Cu(II) are characterized by single crystal X-ray diffraction. It is found that the enaminoketone fragments of the ligand are identical in bond lengths and angles; they are almost planar, and make the angles of 51.3A degrees to the plane of the benzene ring. The structures of Ni(II), Pd(II), and Cu(II) complexes are similar and have a saddle-shape configuration. The metal ions have square planar coordination and are located almost in the center of the N(2)O(2) square. The average M-N bond lengths are longer than M-O ones by 0.014 and 0.034 for the Ni(II) and Cu(II) complexes respectively, while in the Pd(II) complex, M-O is longer than M-N by 0.029 . The average chelate angles N-M-O in the complexes are: N-Ni-O 95.12A degrees; N-Pd-O 95.68A degrees; N-Cu-O 93.88A degrees.
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