A Case Series of Acute Hemorrhagic Leukoencephalitis.

Acute hemorrhagic leukoencephalitis (AHL) is an acute, hemorrhagic demyelinating disease thought to be caused by an immune-mediated process. Acute hemorrhagic leukoencephalitis is both diagnostically challenging and fatal in the majority of cases. We present two cases of AHL unexpectedly diagnosed at autopsy.

"Criss-crossed" dinucleating behavior of an N4 Schiff base ligand: formation of a μ-OH,μ-O2 dicobalt(III) core via O2 activation.

We report the synthesis and structural characterization of a dicobalt(III) complex with a μ-OH,μ-O2 core, namely μ-OH,μ-O2-[Co(enN4)]2(X)3 [1(ClO4)3 and 1(BF4)3]. The dinuclear core is cross-linked by two N4 Schiff base ligands that span each cobalt center. The formally Co(III)-Co(III) dimer is formed spontaneously upon exposure of the mononuclear Co(II) complex to air and exhibits a ν(O-O) value at 882 cm(-1) that shifts to 833 cm(-1) upon substitution with (18)O2.