Crystal structure of the one-dimensional coordination polymer formed by the macrocyclic [Ni(cyclam)]2+ cation and the dianion of di­phenyl­silanediylbis(4-benzoic acid)

The asymmetric unit of the title compound, catena-poly[[(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ4N1,N4,N8,N11)nickel(II)]-μ-4,4′-(di­phenyl­silanedi­yl)dibenz­o­ato-κ2O:O′] sesquihydrate], {[Ni(C26H18O4Si)(C10H24N4)]·1.5H2O}n, consists of the halves of the centrosymmetric macrocyclic cation and the C2-symmetric di­carboxyl­ate dianion and of the water mol­ecule of crystallization. The Ni2+ ion is coordinated by the four secondary N atoms of the macrocyclic ligand characterized by the most energetically favourable trans-III conformation and two mutually trans O atoms of the carboxyl­ate, forming a slightly tetra­gonally elongated trans-N4O2 octa­hedron. The crystals are composed of parallel polymeric chains of the macrocyclic cations linked by the anions of the acid running along the [101] direction. Each polymeric chain is bonded to four neighbouring ones via water mol­ecules providing O—H⋯O hydrogen bonds to the non-coordinated carboxyl O atoms to form a three-dimensional supra­molecular network.