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2005
Manganese
I 6800
28- 022
Manganese
Synthesis, Crystal Structure, and Properties of MnNCN, the First Carbodiimide
of a Magnetic Transition Metal. — Single crystals of the title compound are obtained
from the reaction of ZnNCN and MnCl2 in a LiBr flux at 650 °C. MnNCN crystallizes
in the trigonal space group R3m with Z = 3. Mn 2+ is octahedrally coordinated by N
atoms with a Mn—N distance of 2.26 Å. The anion adopts the linear [N=C=N]2- carbodiimide shape with two C=N double bonds of 1.23 Å. MnNCN contains high-spin MnII
with five unpaired electrons and behaves like an antiferromagnet with an ordering temperature below 30 K. — (LIU, X.; KROTT, M.; MUELLER, P.; HU, C.; LUEKEN, H.;
DRONSKOWSKI*, R.; Inorg. Chem. 44 (2005) 9, 3001-3003; Inst. Anorg. Chem.,
RWTH Aachen, D-52074 Aachen, Germany; Eng.) — Schramke
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