146343-93-3

Upstream product

• 63511-61-5 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin 
• 6147-53-1 cobalt(II) diacetate tetrahydrate 
• 71-48-7 cobalt(II) acetate 

Downstream Products

• 146343-95-5 [(2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrinato)dipyridinecobalt(III)] 
• 22541-53-3 cobalt(II) 

Relevant academic research and scientific papers

Dissociation kinetics of cobalt and zinc β-octabromo-meso-tetraphenyl- and β-octaethyl-meso-tetraphenylporphyrin complexes

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.

Dual-channel-mediated spin coupling for one-electron-oxidized cobalt(II)-saddled porphyrin

Saddle-shaped CoII[OET(p-R)PP] (R = CF3, H, CH 3) can be readily oxidized with Cl2, Br2, and I2 to the corresponding one-electron-oxidation product Co[OET(p-R)PP]X (X = Cl, Br, I) with the clear character of a ring cation radical. With the series of 1H and 13C NMR spectra of these related complexes, both the axial ligand and peripheral substituent of the ring macrocycle are proven to act as a dual channel to tune spin coupling between low-spin Co(II) and a porphyrin π-cation radical. Density functional theory calculations have shown that the antiferromagnetic coupling between spins residing in dz2 and a2u are expected to exist as the ground state. The paramagnetic properties are attributed to an a1u-type ferromagnetic excited triplet state.

The effect of chemical modification of the macrocycle on the complex formation between porphyrins and metal salts in organic solvents

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.

Structure of Phenyl Derivatives of Octaethylporphyrin and Dissociation Kinetics of Their Mn3+, Co2+, and Cu2+ Complexes in Acetic Acid

Octaethyl-, 5-phenyloctaethyl-, 5,15-diphenyloctaethyl-, 5,10,15,20-tetraphenyloctaethyl, and dodecaphenylporphyrins were prepared, and their geometries were optimized by the method of molecular mechanics. The deformation of the porphyrin macroring grows

Dissociation kinetics of copper and cobalt complexes with sterically distorted porphyrins

The dissociation kinetics of the cobalt and copper complexes with octaethylporphyrin, its 5-phenyl, 5,15-diphenyl, and 5,10,15,20-tetraphenyl derivatives, and dodecaphenylporphyrin in acetic acid with small additions of trifluoroacetic acid were studied. In this series of complexes, the steric distortion of the tetrapyrrole macrocycle sequentially increases, which results in a regular decrease in the kinetic stability of the metal porphyrins: The dissociation rate increases by three orders of magnitude.

Solution conformations of dodecasubstituted cobalt(II) porphyrins

The solution conformations of seven dodecasubstituted porphyrins, which generally show extremely nonplanar structures in the crystalline state, have been investigated using a method that combines proton NMR spectroscopy and molecular mechanics calculations. By comparison of the proton paramagnetic shifts measured for cobalt(II) complexes of these porphyrins with the dipolar shifts calculated using geometric factors obtained either from crystallographic data or from molecular mechanics structures, it is determined that the conformations of the macrocycles and their substituents are similar in solution and in the crystalline state. Thus, the nonplanar cobalt-(II) porphyrins that have well-defined cavity structures in the crystalline state retain these cavities in solution. Variable-temperature proton NMR spectroscopy is used to estimate the dynamic stabilities of the cavity structures. The porphyrins with cavities are found to behave differently from planar porphyrins without cavities with regard to the formation of π-complexes with 1,3,5-trinitrobenzene. It is suggested that the cavities may modulate a range of porphyrin-substrate interactions, potentially making these porphyrins useful as regio- and stereoselective oxidation catalysts and in the preparation of complexes with well-defined ligand orientations.