Mercury complexes of meso-tetra-(p-cyanophenyl)porphyrin and N-methylporphyrin: meso-tetra(p-cyanophenyl)porphyrinatomercury(II) and chloro(N-methyl-meso- tetraphenylporphyrinato)mercury(II).

This work for the first time reports X-ray crystals of the two mononuclear mercury(II) porphyrin complexes, i.e., a four-coordinate complex Hg(p-CN)4tpp (1) and a five-coordinate complex Hg(N-Me-tpp)Cl (2). Compound 1 is distorted square planar, whereas compound 2 is trigonal bipyramidal distorted square-based pyramid in which the apical site is occupied by a N(1) atom.