Chemical shift values (in ppm) for 1–2 and selected free bases meso-arylporphyrins and cobalt meso-arylporphyrin complexes from ¹H NMR spectra. The solvent used is the CDCl₃.

Compound	Hβ-pyrrolic protons	H-phenyl protons	H–OCH3a	Ref.
Meso-porphyrins
H2TMPP	8.86	8.08; 7.27	4.10	This work
H2ClTPP	8.89	8.18; 7.74	—	This work
H2TpivPPc	8.82	8.70; 7.88; 7.50	—	34
H2TPPb	8.84	8.23; 7.91; 7.67; 7.26	—	34
Cobalt( iii )-meso-porphyrin complexes
[CoIII(TPP)Cl(DMI)]b,d	8.83	7.87; 7.65	—	35
[CoIII(TPP)(DMI)]+b,d	8.95	7.86; 7.71	—	35
[CoIII(TPP)(N3)(py)]b	9.22	8.38; 7.80	—	36
[CoIII(TPP)Cl(py)]b	9.00	8.80; 7.70	—	36
Cobalt( ii )-meso-porphyrin complexes
[CoII(TPP)]b	15.75	13.10; 9.80; 7.95	—	2
[CoII(TpivPP)]c	15.30	11.50; 10.90; 7.80	—	35
[CoII(TMPP)]	15.90	13.10; 9.43	5.25	This work
[CoII(TClPP)]	15.75	12.93; 9.9	—	This work
[CoII(TPP)(py)]b	12.50	8.5; 8.33; 7.82	—	37
[CoII(TPP)(HIm)]b,e	12.8	8.8; 8.40; 7.69	—	37
[CoII(TMPP)(4-CNpy)] CHCl3 (1)	14.64	11.42; 8.87; 9.01	5.01	This work
[CoII(TClPP)(4-CNpy)] (2)	14.61	11.53; 9.01; 9.42		This work

^aH–OCH₃ = protons of the OCH₃ group in the para-phenyl positions of the H₂TMPP porphyrin.

^bTPP = meso-tetraphenylporphyrinato.

^cTpivPP = meso-(α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinato).

^dDMI = N,N′-dimethylimidazolylidene.

^eHIm = imidazole.