A structurally characterized azide-bridged dinuclear nickel(II) cryptate

The macrobicyclic ligand L2 forms dimetallic Ni-II cryptate species in a delimited pH range, which are further able to include one N-3-anion. The molecular structure of the azide-bridged complex shows an almost linear (NiNNNNiII)-N-II arrangement and a different coordination at the two metal sites (one Ni-II being octahedral, the other trigonal bipyramidal).