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Bis(hfac)-copper(II) complexes bridged by ­pyrimidines showing magnetic interactions by Masanori Yasui; Yoshimitsu Ishikawa; Takayuki Ishida; Takashi Nogami; Fujiko Iwasaki is a Chemistry article available to read on EtoBox.

What is Bis(hfac)-copper(II) complexes bridged by ­pyrimidines showing magnetic interactions about?

Crystals of bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)bispyrimidinecopper(II) (1), bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)bis(4-methylpyrimidine)copper(II) (2), bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)bis(quinazoline)copper(II) (3) showed ferromagnetic interactions at extremely low temperature. Crystal structure analyses revealed that these complexes were __catena__-bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)[μ-pyrimidine-__N__ ^1^:__N__ ^3^]copper(II), [Cu(hfac)~2~(pm)~2~]~__n__~, __catena__-bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)[μ-4-methylpyrimidine-__N__ ^1^:__N__ ^3^]copper(II), [Cu(hfac)~2~(4-Me-pm)]~__n__~, and __catena__-bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)[μ-pyrimidine-__N__ ^1^:__N__ ^3^]copper(II), [Cu(hfac)~2~(qz)]~__n__~, for (1), (2) and (3), respectively. In (1) and (2) the pyrimidines bridge the Cu atoms with an axial–equatorial mode to form one-dimensional spiral chains. Complex (3) also forms a one-dimensional chain structure. The coordination mode of (3) is axial–axial at room temperature, while axial–equatorial at 120 K. On the other hand, the structure of the other modification of the 4-methylpyrimidine complex (4), showing

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Author

Masanori Yasui; Yoshimitsu Ishikawa; Takayuki Ishida; Takashi Nogami; Fujiko Iwasaki

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr) (ISSN 0108-7681)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)