Аннотация:A method for obtaining porphyrin dimers bound by a 1,3-butadiene bridge through homocoupling of 2-boronylethenylporphyrins has been developed. The homocoupling reaction proceeds under mild conditions at room temperature using tetrakistriphenylphosphine palladium as a catalyst in the presence of the oxidizer silver oxide Ag2O. The corresponding dimeric product was obtained from palladium meso-(2-pinacolboronylethenyl)-b-octaethylporphyrinate. The UV-Vis absorption spectrum of the dimeric product is slightly different from that of the monomeric palladium meso-vinyl-b-octaethylporphyrinate, which indicates the absence of p-electronic conjugation between tetrapyrrole aromatic systems. The DFT calculation of the dimer showed that the orthogonal orientation of the butadiene bridge with respect to the plane of tetrapyrrole macrocycles is realized.