Title:
Defective double-cubane, tetranuclear manganese(II) and cobalt(II)
complexes with simultaneous mu(1,1)-Azido and mu-O bridges
Languages of Item:
English
Abstract:
The reactions of M(O2CCH(3))(2). 4H(2)O (M= Mn, Co) with di-2-pyridyl
ketone, (py)(2)CO, and NaN3 in CH3OH or CH3OH/ H2O allow isolation of
the tetranuclear compounds [Mn-4(mu
(1.1)-N-3)(2)(N-3)(2)(py)(2)C(OH)O(2)(py)(2)C(OCH3)O(2)] (1) and
[Co-4(mu
(1.1)-N-3)(2)(N-3)(2)(py)(2)C(OH)O(2)(py)(2)C(OCH3)O(2)]. 2H(2)O
(2). X-ray diffraction analysis reveals defective double-cubane
tetrameric entities in which the Mn-II or Co-II atoms are linked by mu
(1.1)-N-3 bridges and two kinds of O-bridges. The molar magnetic
susceptibility measurements of 1 and 2 in the 2-300 K range indicate
weak antiferromagnetic coupling for 1 and clear bulk ferromagnetic
coupling for 2.
Authors:
Papaefstathiou, GS
Escuer, A
Raptopoulou, CP
Terzis, A and
Perlepes, SP
Vicente, R
Journal:
European Journal of Inorganic Chemistry
Main subject category:
Science
