In:
Journal of Physical Organic Chemistry, Wiley, Vol. 19, No. 4 ( 2006-04), p. 263-268
Kurzfassung:
A calorimetric method for the determination of cooperative hydrogen bonding (HB) enthalpy of protonacceptors (B) with associated species of alcohols is proposed. The average enthalpy of cooperative HB ofpyridine with associated species of alcohols was found to be −19.8 ± 0.6 kJ mol −1 for all alcohols investigated. Thisvalue exceeds the enthalpy of HB in the complex ROH … NC 5 H 5 (the average for all alcohols is −15.8 ± 0.2 kJ mol −1 ) by 20–30%. Cooperativity factors ( A b , A Ox ) of hydrogen bonds for (ROH) 2 … NC 5 H 5 complexes were determined using the IR‐spectroscopic method. The average values for the alcohols under consideration were found to be A b = 1.41 ± 0.04 and A Ox = 1.54 ± 0.05. On the basis of IR‐spectroscopic and calorimetric data, the enthalpy of cooperative interactions of pyridine with the dimer (ROH) 2 was estimated. This value for all the alcohols studied is, on average, −20.9 ± 0.1 kJ mol −1 . Copyright © 2006 John Wiley & Sons, Ltd.
Materialart:
Online-Ressource
ISSN:
0894-3230
,
1099-1395
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2006
ZDB Id:
1475025-9