Bis(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-κ4N)(μ-l-malato-κ4O1,O2:O4,O4′)dinickel(II) bis(perchlorate) monohydrate

In the crystal structure of the title dinuclear compound, [Ni2(C4H4O5)(C16H36N4)2](ClO4)2·H2O, the bridging dicarboxylate dianion O,O′-chelates to two Ni atoms, both of which are also chelated by the N-macrocylic ligand. The Ni atoms exhibit a distorted octahedral coordination. N—H...O and O—H...O hydrogen bonds link the cations and the uncoordinated water molecules into a layer structure; the perchlorate anions occupy the space between adjacent layers, and are only weakly linked to the layers. One of the perchlorate anions is disordered over two sets of sites in a 3:2 ratio