@article{2928395,
    title = "Defective double-cubane, tetranuclear manganese(II) and cobalt(II)
complexes with simultaneous mu(1,1)-Azido and mu-O bridges",
    author = "Papaefstathiou, GS and Escuer, A and Raptopoulou, CP and Terzis, A and and Perlepes, SP and Vicente, R",
    journal = "European Journal of Inorganic Chemistry",
    year = "2001",
    number = "6",
    pages = "1567-1574",
    issn = "1434-1948, 1099-0682",
    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."
}