
TY  - JOUR
A1  - Chakraborty, S 
A1  - Clezy, PS 
A1  - Sternhell, S 
A1  - van, Thuc L 
T1  - The chemistry of pyrrolic compounds. LII. The preferred pathway of electron delocalization in metalloporphyrins
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1982
VL  - 35
IS  - 11
SP  - 2315
EP  - 2323
KW  - 
UR  - https://doi.org/10.1071/CH9822315 
N2  - Measurement of the proton coupling constant in the allylic unit, CH3-C=C-H, of the zinc(II), nickel(II) and magnesium(II) chelates of the deuteroporphyrin isomer (3a) points in each case to the double bond of this system having a significantly diminished bond order. Similar data have been obtained for the dication derivative of (3a). These findings are in accord with the view that the &#960;-electron delocalization pathway in porphyrin dications and metalloporphyrins involves the periphery of the molecule as was previously shown for the metal-free porphyrin. New synthetic approaches to the porphyrin (3a) have been studied. 
ER  -

