Synthesis of new sandwich intermediate sitting-atop complexes between meso-tetraarylporphyrins and germanium(IV) chloride

GeCl4 and meso-tetraarylporphyrins (H2TAPP) react in chloroform solvent for formation sandwich intermediate sitting-atop (i-SAT) complexes, [GeCl4(H2TAP)2]. The various spectral data (1H NMR, 13C NMR, UV–Vis, FT-IR and elemental analysis) were used for characterization of the i-SAT complexes. In the sandwich complexes, the pyrrole rings of two porphyrin macrocycles are tilted up and down and act as electron donors by lone pairs of pyrrolic nitrogens to germanium center of GeCl4. The spectral results of 1H NMR and FT-IR showed that in the i-SAT complexes, the hydrogen atoms of two pyrrolic nitrogens remained still on the porphyrin macrocycles.

Reaction of meso-tetraarylporphyrin (H2TAP) and germanium(IV) chloride leads to the formation of sandwich i-SAT complex, [GeCl4(H2(TAP)2], that four nitrogen atoms of pyrrolic in the two porphyrin macrocycles act as electron donors to one germanium center.Figure optionsDownload as PowerPoint slide