The heptanuclear aluminium-nitrogen cage compound [(AlMe(2))(4)(AlMe)(3)(NHNMe)(3)(N-NMe)(OMe)] contains the unique hydrazinetriide fragment [N-N(Me)](3-) stabilized by coordination to five Al atoms. It was synthesised by thermolysis of the sesqui-hydrazide Al[(μ-NH-NHMe)(2)AlMe(2)](3) in refluxing toluene in the presence of a small quantity of methanol.
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