TY - JOUR
T1 - ESR studies at high pressure. II. Spin exchange of 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxyl in protic and aprotic solvents
AU - Sueishi, Y.
AU - Nishimura, N.
AU - Hirata, K.
AU - Kuwata, K.
PY - 1990
Y1 - 1990
N2 - The activation volumes for the spin exchange of 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxyl (Tanone) in protic and aprotic solvents were determined from the pressure dependence of the rate constants, and were compared with those for the diffusive process. It was concluded that the rate process for the spin exchange in aprotic solvents is a diffusion-controlled one, and in protic solvents an encounter complex as intermediate is formed. The average reaction volume for the complex formation in protic solvents was estimated to be -3.6 cm3 mol-1.
AB - The activation volumes for the spin exchange of 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxyl (Tanone) in protic and aprotic solvents were determined from the pressure dependence of the rate constants, and were compared with those for the diffusive process. It was concluded that the rate process for the spin exchange in aprotic solvents is a diffusion-controlled one, and in protic solvents an encounter complex as intermediate is formed. The average reaction volume for the complex formation in protic solvents was estimated to be -3.6 cm3 mol-1.
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U2 - 10.1246/bcsj.63.252
DO - 10.1246/bcsj.63.252
M3 - Article
AN - SCOPUS:0025375209
VL - 63
SP - 252
EP - 254
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 1
ER -