A novel bismercury(II) complex of bidentate N(21),N(22)-bridged porphyrin: ((benzamido-kappa N)phenylmercury-kappa Hg-N(21),N(22))-meso-tetraphenylporphyrinato-N(23),N(24) phenylmercury(I I) toluene solvate

Reaction of PhHgOAc with N-NHCOC(6)H(5)-Htpp gave a bismercury(II) complex [((benzamido-kappa N)phenylmercury-kappa Hg-N(21),N(22))-meso-tetraphenylporphyrinato-N(21),N(24)]phenylmercury(II) toluene solvate [Hg(Ph)(N(21),N(22)-(Ph)-Hg-N(COPh)tpp center dot C(6)H(5)CH(3); 3 center dot C(6)H(5)CH(3)] with Hg(1)-N(5) as N(21),N(22)-bridged atoms. The crystal structure of 3 center dot C(6)H(5)CH(3) was determined. The Hg(1)center dot center dot center dot Hg(2) distance is 3.611(7) angstrom. Hence, no metallophilic Hg(II)center dot center dot center dot Hg(II) interaction is present. 3 in CDCl(3) was characterized by (1)H, (13)C, and (199)Hg NMR. The (199)Hg NMR spectrum for 3 in CDCl(3) solution 20 degrees C clearly reveals that there are two different Hg nuclei, i.e. Hg(1) and Hg(2) and this NMR data provides an evidence that 3 remains as a bismercury species in CDCl(3) solution. The 199Hg NMR spectrum for a 0.2 M solution of 3 in CDCl(3) at 20 degrees C is observed at -1088 ppm for Hg(2) nucleus with (3)J(Hg-H)=188 Hz and an effective coordination number of five and at -1119 ppm for Hg(1) nucleus with (3)J(Hg-H)=177 Hz and an effective coordination number of four. The proton and (199)Hg NMR spectra clearly show (3)J(Hg-H) coupling and these NMR data indicate no ligand exchange for 3 in CDCl(3). (C) 2008 Elsevier Ltd. All rights reserved