63444-26-8Relevant academic research and scientific papers
The effect of chemical modification of the macrocycle on the complex formation between porphyrins and metal salts in organic solvents
Maltceva,Mamardashvili, N. Zh.
, p. 1175 - 1183 (2017/08/08)
The complex formation of β-octaethylporphyrin, β-octaethyl-meso-monophenylporphyrin, β-octaethyl-meso-tetraphenylporphyrin, meso-diphenylporphyrin, meso-triphenylporphyrin, and meso-tetraphenylporphyrin with Zn(II), Cu(II), Co(II), and Mn(II) acetates and chlorides in dimethylformamide, dimethylsulfoxide, pyridine, acetic acid, and a chloroform–methanol 1 : 1 mixture has been studied by means of spectrophotometry. The observed regulations are in line with the concept of chemical reactivity of the N–H bonds in porphyrins of different complexity.
Dissociation kinetics of cobalt and zinc β-octabromo-meso-tetraphenyl- and β-octaethyl-meso-tetraphenylporphyrin complexes
Pukhovskaya,Guseva,Semeikin,Golubchikov
, p. 190 - 193 (2008/10/09)
Kinetics of solvoprotolytic dissociation of zinc and cobalt porphyrin complexes with a porphyrin macrocycle distorted to different extents (β-octaethyl-meso-tetraphenylporphyrin and β-octabromo-meso- tetraphenylporphyrin) have been studied in binary proton-donating solvents. The main factor decreasing the stability of the porphyrin complexes is the distortion of the planar structure of the macrocycle. The reactivity of the cobalt porphyrins is governed by both structural and electronic effects.
Extra coordination properties of spatially distorted zinc porphyrins
Pukhovskaya,Guseva,Semeikin,Kuvshinova,Golubchikov
, p. 572 - 576 (2008/10/09)
Two series of synthetic porphyrins with a progressively increasing degree of macrocycle deformation were studied. The equilibrium constants for the extra coordination of piperidine and N-methylimidazole by zinc complexes of spatially distorted porphyrins, octaethylporphyrin derivatives, and spatially hindered and planar analogs were determined. It was found that the steric distortion of the porphyrin nucleus destabilizes the extra complexes. Copyright
Distortion and aromatization factors on the complexing ability of tetrapyrrole macrocycles in acetonitrile
Berezin,Bazlova,Malkova,Andrianov
, p. 295 - 299 (2008/10/08)
The kinetics of complexation between porphyrins and zinc acetate in acetonitrile was studied for the porphyrins belonging to various structural groups, including aza-, benzo-, and distorted N- and multiply substituted macrocycles. The effects of the distortion, on the one hand, and the enhanced rigidity of a macrocycle, on the other, on the complexation process were considered. The coordination of the distorted porphyrins to metal salts is facilitated because of the disturbance of the steric component of the macrocyclic effect (MCE), whereas the complexation of the rigid macrocycles is facilitated because of the activation of the electronic component of MCE.
