Low-valent nickel thiaporphyrins. Nuclear magnetic resonance and electron paramagnetic resonance studies

摘要: The 2 H NMR spectra of one-electron reduction product nickel(II) tetraphenyl-21-thiaporphyrin have been recorded. following selectively deuterated thiaporphyrins used: 5,20-diphenyl-10,15-bis(phenyl-d 5 )-21-thiaporphyrin (STPPH-d 10 ), 5, 10, 15,20-tetraphenyl-21-thiaporphyrin (STPPH-ds) at pyrrole β-positions, 5,20-diphenyl-10,15-bis(p-tolyl)-21-thiaporphyrin (SDPDTPH-d ) the thiophene β-position. Two characteristic patterns chemical shifts for one-electron-reduced specify established as exemplified by Ni(STPP-d 6 (pyrrole, -52.3, 25.6, 21.0 ppm; 363 K), Ni(SDPDTP-d (thiophene; 41 293 K) and Ni-(STPP-d )(1-MeIm) 61.3,42.3, 20.8 298