C?H and N?H bond dissociation energies of five- and six-membered ring aromatic compounds

2003 ◽  
Vol 16 (12) ◽  
pp. 883-890 ◽  
Author(s):  
Yong Feng ◽  
Jin-Ti Wang ◽  
Lei Liu ◽  
Qing-Xiang Guo
Keyword(s):  
Aromatic Compounds ◽  
Membered Ring ◽  
Bond Dissociation Energies ◽  
Bond Dissociation ◽  
Dissociation Energies

Studies of the variations in bond dissociation energies of aromatic compounds - II. Substituted bromobenzenes

1953 ◽  
Vol 219 (1138) ◽  
pp. 353-366 ◽  
Keyword(s):  
Benzene Ring ◽  
Bond Dissociation Energy ◽  
Aromatic Compounds ◽  
Frequency Factor ◽  
Bond Dissociation Energies ◽  
Kcal Mole ◽  
Bond Dissociation ◽  
Dissociation Energies ◽  
Tentative Explanation ◽  
The Difference

The paper reports the effects of substituents on C— Br bond dissociation energy in substituted bromobenzenes. The following substituents introduced in various positions of benzene ring were investigated: F, Cl, Br, CH 3 , C 6 H 5 , CN and OH. In addition, the studies were extended to bromopyridines and bromothiophene. Assuming that the frequency factor is constant for the series of decompositions, the following values were obtained for the difference ∆ D = D ( Ph — Br) - D ( Ph s — Br), where Ph s Br denotes a molecule of substituted bromobenzene: substituent ∆D (kcal/mole) substituent ∆D (kcal/mole) p -F 0-5 m -C 6 H 5 0-8 p -Cl 0-6 o -C 6 H 5 2-7 m -Cl 1-0 p -CN 0-3 o -Cl 1-2 m -CN 0-8 p -Br 0-3 o -CN 0-6 o -Br 1-8 p -OH 3-9 P -CH 3 0-2 o -OH 3-8 m -CH 3 0-2 3-bromopyridine -5-0 o -CH 3 0-8 2-bromopyridine -0-6 p -C 6 H 5 0-2 2-bromothiophene 2-4 The significance of these results is discussed, and a tentative explanation of the observed effects is proposed.

scholarly journals Experimental bond dissociation energies of benzylpyridinium thermometer ions determined by threshold-CID and RRKM modeling

2017 ◽  
Vol 417 ◽  
pp. 69-75 ◽  
Author(s):  
David Gatineau ◽  
Antony Memboeuf ◽  
Anne Milet ◽  
Richard B. Cole ◽  
Héloïse Dossmann ◽  
...  
Keyword(s):  
Bond Dissociation Energies ◽  
Bond Dissociation ◽  
Dissociation Energies ◽  
Thermometer Ions
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