Kinetic stability of substituted tetrapyrazinoporphyrazines in a system nitrogen base-dimethylsulfoxide

Effect of the Sterical Factor on the Kinetics of Octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine in a Nitrogen-Containing Base–Dimethylsulfoxide System

“…Since there are currently few quantitative data on the stability of annelated porphyrazines in protonacceptor media [2,3], in this work we studied the state of octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine in dimethylsulfoxide and the nitrogencontaining base (B)-dimethylsulfoxide (DMSO) system, along with the effect the substituents in the macrocycle have on the kinetic parameters of octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine (H 2 Pa((C 6 H 4 Bu) 2 Pyz) 4 ) and octaphenyltetrapyrazinoporphyrazine (H 2 Pa(Ph 2 Pyz) 4 ). Variable B was n-butylamine (BuNH 2 ), tert-butylamine (Bu t NH 2 ), diethylamine (Et 2 NH), or tri-n-butylamine (Bu 3 N) EXPERIMENTAL Octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine was synthesized as in [4].…”