Journal of Chemistry

Research Article

Synthesis and Spectroscopic Studies of Axially Ligated Zn(II)5,10,15,20-meso-tetra(p-chlorophenyl)porphyrin with Oxygen and Nitrogen Donors

Table 2

¹H NMR data of free base H₂-t(p-Cl)PP and axially ligated Zn^II-t(p-Cl)PP showing chemical shift (δ in ppm) values in CDCl₃ at 298 K.


Porphyrins	β-Pyrrole protons	Imino protons	Meso-aryl protons	Other protons

H₂t(p-Cl)PP	8.89 (S)	−2.93 (S)	8.25 (d, 8H, H_o)
			7.75 (d, 8H, H_m)
Zn-t(p-Cl)PP	8.93 (S, 8H)	—	8.20 (d, 8H)
			7.74 (m, 10H)
phO-Zn-t(p-Cl)PP	8.54 (S, 8H)	—	8.29 (d, 8H, H_o)
			7.80 (d, 8H, H_m,P)
p-OCH₃phO-Zn-t(p-Cl)PP	8.92 (S, 8H)	—	8.26 (d, 8H, H_o)	3.8 (S, 3H, H_ome)
			7.78 (d, 8H, H_m,P)
p-NH₂phO-Zn-t(p-Cl)PP	8.95 (S, 8H)	—	8.27 (d, 8H, H_o)	5.6 (S, 2H, H_NH2)
			7.79 (d, 8H, H_m,P)
p-CH₃phO-Zn-t(p-Cl)PP	9.2 (S, 8H)	—	8.21 (d, 8H, H_o)	2.7 (S, 3H, H_me)
			7.7 (d, 8H, H_m,P)
p-NO₂phO-Zn-t(p-Cl)PP	8.18 (S, 8H)	—	8.23 (d, 8H, H_o)
			7.60 (d, 8H, H_m,P)
p-CH₃py-Zn-t(p-Cl)PP	8.12 (S, 8H)	—	8.26 (d, 8H, H_o)	2.6 (S, 3H, H_me)
			7.96 (d, 8H, H_m,P)
p-NH₂py-Zn-t(p-Cl)PP	8.27 (S, 8H)	—	8.16 (d, 8H, H_o)	5.4 (S, 2H, H_NH2)
			7.46 (d, 8H, H_m,P)
p-CN-py-Zn-t(p-Cl)PP	8.25 (S, 8H)	—	8.05 (d, 8H, H_o)
			7.29 (d, 8H, H_m,P)

in ppm, the nature of splitting pattern (S) (S: Singlet, d: doublet, t: triplet, m: multiplet), number of proton (s) and their location in the porphyrins respectively are given in parenthesis; o: ortho; p: para; m: meta.