Structure of bis(5,6,11,12-tetrahydro-2,8-dimethylphenhomazine)-nickel(II) perchlorate

Abstract

An X-ray diffraction study of the title compound, [NiL₂][ClO₄]₂·3CH₃NO₂, was carried out to investigate the stereochemistry of the mesocyclic ligand complexed to nickel(II). The compound crystallizes in space group Pbnb with lattice constants a= 10.289(1), b= 18.471(3), c= 22.271(4)Å, and Z= 4. The intensity data were collected on a CAD-4 automated diffractometer and the structure was refined to a final R value of 0.068 for 1 339 unique reflections. The structure consists of discrete [NiL₂]²⁺ cations, ClO₄^– anions, and CH₃NO₂ molecules of crystallization. The axial positions are shielded by the hydrogen atoms of the rings, thus preventing octahedral co-ordination. The average Ni–N distance is 1.912(7)Å and the chelate bite angle N(1)–Ni–N(2) is 86.6(2)°.