Application of 28903-71-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Can a Nitrosyl of a Mn(II)-Porphyrin Complex Release Nitroxyl/HNO?. Author is Mazumdar, Rakesh; Saha, Shankhadeep; Samanta, Bapan; Mondal, Biplab.
In general, the nitrosyl complexes of Mn(II)-porphyrinate having the {Mn(NO)}6 configuration are not considered as HNO or nitroxyl (NO-) donors because of [MnI-NO+] nature. A nitrosyl complex of Mn(II)-porphyrin, [Mn(TMPP2-)(NO)], [1, TMPPH2 = 5,10,15,20-tetrakis-4-methoxyphenylporphyrin], is shown to release HNO in the presence of HBF4. It is evidenced from the characteristic reaction of HNO with PPh3 and isolation of the [(TMPP2-)MnIII(H2O)2](BF4) (2). This is attributed to the fact that H+ from HBF4 polarizes the NO group whereas BF4- interacts with metal ion to stabilize the Mn(III) form. These two effects cooperatively result in the release of HNO from 1. Complex 1 behaves as a nitroxyl (NO-) donor in the presence of [Fe(dtc)3] (dtc = diethyldithiocarbamate anion) and [Fe(TPP)(Cl)] (TPP = 5,10,15,20-tetraphenylporphyrinate) to result in [Fe(dtc)2(NO)] and [Fe(TPP)(NO)], resp.
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