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Electronic absorption spectra of aliphatic diamine radical cations. Conformation‐dependent charge delocalization
Author(s) -
Gȩbicki Jerzy,
Marcinek Andrzej,
Stradowski Czesław
Publication year - 1990
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.610030909
Subject(s) - chemistry , delocalized electron , radical ion , photochemistry , octane , absorption spectroscopy , absorption (acoustics) , radiolysis , diamine , dabco , electronic structure , crystallography , radical , ion , computational chemistry , polymer chemistry , organic chemistry , physics , quantum mechanics , acoustics
Electronic absorption spectra of radical cations generated by steady‐state and pulse radiolysis from a series of α,ω‐diaminoalkanes (R 2 N(CH 2 ) n NR 2 ; n = 1–6, R = CH 3 or C 2 H 5 ), 1,4‐dimethylpiperazine and 1,4‐diazabicyclo [2.2.2] octane (DABCO) were measured. In some cases spectral evidence was obtained for an interaction between the nitrogen atoms leading to charge delocalization in the radical cation. A delayed formation of radical cations was associated with a conformational change necessary for achieving the most stable structure having a favourable conformation for charge delocalization.