Novel tandem synthesis of bis(μ-NN′-tetrazolate) bridged dinuclear nickel(ii) Schiff base complex via [3 + 2] cyclo-addition at ambient condition

Abstract

A novel bis(μ-NN′-tetrazolate) bridged centrosymmetric dinuclear nickel(II) Schiff base complex [Ni₂(L)₂(PTZ)₂]·2H₂O·2CH₃CN (HL is a tridentate Schiff base, 2-((2-(ethylamino)ethylimino)methyl)-6-methoxyphenol and HPTZ is 5-pyrazinyltetrazole) has been synthesized via [3 + 2] cyclo-addition reaction of 2-cyanopyrazine and sodium azide in presence of nickel(II) acetate tetrahydrate and HL. The structure of the complex is confirmed by single crystal X-ray diffraction analysis. The combination of H-bonding and C–H⋯π interactions creates a 3⁶-hxl topological supramolecular network. The acetonitrile molecules are encapsulated as a hydrophobic guest within the 2D supramolecular network.