Poly[chlorido-μ3-1,2,4-triazolato-nickel(II)

Abstract

The title compound, [Ni(C2H2N3)Cl]n, has been prepared by the hydro­thermal reaction of nickel(II) chloride and 1,2,4-triazole. The nickel cation is coordinated in a slightly distorted tetra­hedral environment, by one Cl atom and three N atoms from different triazolate ligands. The polymeric layer is formed by the triply bridging nature of the 1,2,4-triazolate bonded to three different Ni atoms through its three N atoms. The layer contains both binuclear units and tetra­nuclear cavities. In the binuclear unit, two Ni atoms are bridged by two nearly coplanar triazolate groups through the 1,2-positions, affording a six-membered ring around an inversion center. Each binuclear unit is further connected to four parallel units through the 4-positions of the triazolate groups. Four adjacent units, which are parallel in pairs, afford 16-membered tetra­nuclear cavities. In such a cavity, the two nearest-neighbor Ni atoms are bridged by a single triazolate group through the 1,4-positions.