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[Mn (n- Bu)(NPEt 3 )] 4  has been prepared by the reaction of [MnBr(NPEt 3 )] 4  with n-butyllithium in boiling pentane. The pyrophoric compound forms red, moisture sensitive crystals, which were characterized by IR spectroscopy and by a crystal structure determination (tetragonal, space group 14 1 /a, Z = 4, structure solution with 699 observed unique reflections, R = 0.054. Lattice dimensions at -50 °C:a = b = 2177.4(3) pm, c = 1147.1(2) pm). [Mn (n-Bu)(NPEt 3 )] 4  forms a nearly perfect Mn 4 N 4  hetero cubane framework with μ 3 -N bridges of the NPEt 3  -  groups and σ-bonded n-butyl groups with Mn - C distances of 216.8 pm. The n-butyl groups and two of the ethyl groups are disordered.

zeitschrift für naturforschung b

[Mn(n-Bu)(NPEt 3 )] 4 , eine manganorganische Verbindung mit Heterocuban -Struktur [Mn(n-Bu)(NPEt 3 )] 4 , an Organomanganese Compound with Heterocubane Structure