Dimeric complexes of manganese(II) and Nickel(II) hexafluoroacetylacetonates with pyrazole-containing nitronylnitroxyl radicals

G. V. Romanenko, S. V. Fokin, S. F. Vasilevskii, E. V. Tret'Yakov, Yu G. Shvedenkov, V. I. Ovcharenko

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Reactions of Ni(II) and Mn(II) hexafluoroacetylacetonates with pyrazole-containing nitronylnitroxyl radicals (L) result in dimeric heterospin complexes [M(hfac)2L]2 or [M(hfac)2L]2·C6H6. The paramagnetic ligands in the centrosymmetric binuclear molecules function as a bridge, with the nitroxyl O atom being bound to one metal and the imine N atom of the pyrazole ring to the other metal atom. The metal environment is a cis-octahedron with short M-ONO distances, which specifies a strong antiferromagnetic interaction between the lone electrons of paramagnetic centers in M-O•-N< exchange clusters.

Original languageEnglish
Pages (from-to)360-367
Number of pages8
JournalRussian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
Issue number5
Publication statusPublished - 1 Dec 2001
Externally publishedYes


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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