135766-12-0Relevant articles and documents
Copper(II), cobalt(II), cobalt(III), and tin(IV) 5,10,15,20-tetraphenyl tetrabenzoporphyrinates: Synthesis and properties
Chizhova,Mal’tseva,Zav’yalov,Mamardashvili, N. Zh.
, p. 683 - 687 (2017)
The complexation reactions of 5,10,15,20-tetraphenyl tetrabenzoporphyrin and the metal exchange reactions of its cadmium(II) complex with copper(II), cobalt(II), and tin(II) acetates and chlorides in a chloroform–methanol mixture and dimethylformamide were studied spectrophotometrically. Corresponding copper(II), cobalt(II), cobalt(II), and tin(IV) porphyrinates were synthesized and identified.
Metal exchange reactions in cadmium complexes with porphyrins of various structures
Berezin,Shukhto,Reshetyan
, p. 518 - 526 (2010)
The reaction kinetics of the metal exchange Cd(II)-Cu(II) and Cd(II)-Zn(II) in the cadmium complexes (CdP) with porphyrin ligands (H2P) differing by degree of stiffness (tetraphenylporphin, N- methyltetraphenylporphin, and tetraphenyltetrabenzoporphin) in the DMSO medium, was studied using spectrophotometric method. The rate of metal exchange reaction depends on the nature of the non-planatrity of H2P in the structure of CdP complexes, as well as on the additional screening of the reaction center MN4 by the extra-ligands and substituents. The reduction of the coordinating ability of the anion X- in the structure of the solvate-salt of incoming metal M'X2(Solv) n-2 in a series: acetylacetonate > acetate > chloride > nitrate favors the metal exchange. In the most studied cases the reaction of CdP proceeds along a combined associative-dissociative mechanism. The order of the metal exchange reaction is found to be depending on temperature indicating a change in the contributions of associative and combined routes. The "pure" associative reaction mechanism in a medium of DMSO was for the first time found for the labile complex CdTPTBP with the saddle-type nonplanar ligand.
Trans-effect in kinetics of reactions of mixed solvates of Cu(II) acetate with tetraphenyltetrabenzoporphine in organic solvents
Berezin,Toldina
, p. 579 - 583 (2004)
The kinetics of complex formation of tetraphenyltetrabenzoporphine with Cu(II) and Zn(II) acetates is studied in individual and mixed coordinating solvents on the basis of DMSO, DMF, and Py. The substantial increase in CuAc2 reactivity in mixed
Complexation of tetraphenyltetrabenzoporphine with Cu(II), Cd(II), Zn(II), and Co(II) salts in organic solvents
Berezin,Toldina
, p. 573 - 578 (2008/10/09)
The rate and activation parameters of tetraphenyltetrabenzoporphine (H 2TPTBP) complexation with 3d-metal acetates and acetylacetonates are shown to be determined by the solvent nature. With an increase in the electron-donor properties of a solvent, the reaction rate increases due to protonation of N-H bonds and decreases as MAm(Solv)n - m salt solvates become more stable. As the result, the rate of a reaction with ZnAc2 increases in the series: DMF 3CN 6H6. In inert and weakly coordinating solvents, the transition state of a reaction is supposed to be formed according to the mechanism of contraction of the salt coordination sphere. The rate of H2TPTBP reaction with metal acetates in pyridine changes in the series: Cu(II) > Cd(II) > Zn(II) > Co(II), while the stability of the obtained complexes decreases in the series Cu(II) > Co(II) > Zn(II) > Cd(II). It is shown that the spectral criterion of the complex stability can be used in the series of metal complexes with one ligand, but it is violated if the ligand structure is changed.
Effect of a proton-donating solvent on the complexation of classical and nonclassical porphyrins in a pyridine medium
Berezin,Toldina
, p. 1910 - 1916 (2008/10/08)
The inhibitory effect of proton-donating additives (HAc) on the rate of coordination reaction (1) of tetrabenzoporphine (H2TBP, I), tetraphenyltetrabenzoporphine (H2TPTBP, II), and N-substituted porphyrins III and IV in pyridine was established. The N-H bonding state in compounds I and II and the reactivity of these compounds in reaction (1) were shown to be similar to those of nonclassical porphyrins (H2P), whereas N-substituted porphyrins apparently do not belong to this group. The inhibition of reaction (1) in the case of compounds III and IV is due to the high basicity of the tertiary nitrogen atoms in these molecules.
