Bis(5,5,7,12,12,14-hexa­methyl-1,4,8,11-tetra­azacyclo­tetra­decane-κ(4) N)(μ-l-mal­ato-κ(4) O (1),O (2):O (4),O (4′))dinickel(II) bis(perchlorate) monohydrate

In the crystal structure of the title dinuclear compound, [Ni(2)(C(4)H(4)O(5))(C(16)H(36)N(4))(2)](ClO(4))(2)·H(2)O, 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.