Gravar-mail: Crystal structures of two nickel(II) macrocyclic salts: (5,7,7,12,12,14-hexa­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne)nickel(II) bis­(perchlorate) monohydrate and (5,7,7,12,12,14-hexa­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne)nickel(II) dibromide trihydrate