107405-99-2

Upstream product

• 107374-53-8 cobalt(II) 5β,15β-bis{2-(2,2-dimethylpropanamido)phenyl}-10α,20α-(nonanediamidodi-o-phenylene)porphyrin 1-methylimidazole complex 
• 111957-19-8 cobalt(II) 5α,15.beta-bis{2-(2,2-dimethylpropanamido)phenyl}-10α,20α-(nonanediamidodi-o-phenylene)porphyrin 1-methylimidazole complex 
• 111957-12-1 cobalt(II) 5α,15α-bis{2-(2,2-dimethylpropanamido)-phenyl}-10.alpha,20.alpha-(nonanediamidodi-o-phenylene)porphyrin 1-methylimidazole complex 

Relevant academic research and scientific papers

Regulated dioxygen affinities by steric restrictions on axial bases in jellyfish type cobalt(II) porphyrins

The title compounds were prepared to examine the effect of axial base orientation on the dioxygen affinities of (porphyrinato)-cobalt(II) complexes. These porphyrins were derived from meso-tetrakis(2-aminophenyl)porphyrin, with valeramido or pivalamido groups appended on one side of the porphyrin plane as fences in order to control the orientation of the axial base plane, while a nonanediamido or dodecanediamido group is bridged over the other side of the porphyrin plane to inhibit the binding of axial bases. Equilibrium constants in toluene solution are reported for bindings of imidazoles, pyridine, and O2 to the cobalt(II) complexes of these porphyrins. As the steric bulk of the fences increases, the bindings of axial bases are enhanced, while the dioxygen affinities are decreased. These changes in dioxygen affinities are interpreted in terms of the orientation of the axial base plane, which changes the strength of π-electron donation from the axial base to the (porphyrinato)cobalt(II).