Table . Comparison of the ∆σmax (ppm) in 13 C, N and 1 H atoms of 22-Pꞏ10CSA(S), 4-Pꞏ10CSA(S), and -Pꞏ10CSA(S) recorded with 20 eq. of analyte. The signal positions were determined using 2D NMR techniques (CD3CN). On the right side, illustration of the 22-P, 4-P, and -P with highlighted positions (blue and red represents the splitting signals between them), dashed green line -mirror planes, yellow dotted linesinversion points. -][HSO4 -]4 core. Porphyrin α2β2-P is represented in black(C) and blue(N), with the reference structure (CuTPP) in red dotted lines. Right top: top view and sideview of α2β2-P-SO4 structure. Non-essential hydrogens, majority of counter anions and solvent molecules omitted for clarity, thermal ellipsoids shown at 50% probability.