Kalashnikov, Valery V. published the artcile5-Phenyl- and 5,10-diphenyltetrabenzoporphyrins: Novel synthetic approach, physicochemical study with an emphasis on NMR spectroscopy, and identification of benzylated derivatives, COA of Formula: C8H4N2, the main research area is tetrabenzoporphyrin phenyl preparation NMR UV VIS.
Novel synthetic approach to low-symmetry meso-Ph substituted tetrabenzoporphyrins (TPBs) by Zn(OAc)2 templated assembly of phthalonitrile in the presence of benzyltriphenylphosphonium chloride has been proposed affording two main products: 5-phenyl-21H,23H-TBP (I) and 5,10-diphenyl-21H,23H-TBP (II) with higher yield for compound I. Procedure for isolation of I and II in individual high purity state has been developed supplemented with selection of an appropriate NMR solvent system (CDCl3 with 1% additive of CF3COOH) that allowed full signal assignment in 1H and 13C spectra to be made utilizing homonuclear 1H-1H (COSY, NOESY, TOCSY) and heteronuclear 1H-13C (HSQC) correlation techniques. Isolation and physicochem. study of a mixture of monobenzylated co-products were carried out as well involving 1D and 2D NMR spectroscopies, which for the first time allowed not only to find out their structure, but also to determine the ratio of the positional isomers formed.
Dyes and Pigments published new progress about NMR (nuclear magnetic resonance). 91-15-6 belongs to class nitriles-buliding-blocks, name is Phthalonitrile, and the molecular formula is C8H4N2, COA of Formula: C8H4N2.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts