TY - JOUR
T1 - A quantum chemical study of the gas-phase homolytic S–Br bond dissociation enthalpies of sulfenyl bromides
AU - Zhu, Shuaiwei
AU - O'Reilly, Robert J.
PY - 2020/8
Y1 - 2020/8
N2 - This study reports the gas-phase homolytic S–Br bond dissociation enthalpies (at 298 K) for a set of 44 sulfenyl bromide derivatives (RSBr) obtained using the high-level G4 thermochemical protocol. For the species in this set, we find that the BDEs range from 178.0 kJ mol–1 (F3CSSBr) to 239.5 kJ mol–1 (HC(=NH)SBr). We have additionally reported molecule and radical stabilization enthalpies for all species, allowing for insights to be gained as to the effect of substituents in both the sulfenyl bromide reactants and the sulfur-centered radical products. In addition, we have also reported the BDEs of six sufinyl bromides (RS(=O)Br) and six sulfonyl bromides (RSO2Br). For the sulfinyl bromides, the BDEs range from 156.6 kJ mol–1 (F3CS(=O)Br) to 173.8 kJ mol–1 (tBuS(=O)Br), whilst for the sulfonyl bromides, the BDEs range from 211.0 kJ mol–1 (F3CSO2Br) to 226.2 kJ mol–1 (FSO2Br).
AB - This study reports the gas-phase homolytic S–Br bond dissociation enthalpies (at 298 K) for a set of 44 sulfenyl bromide derivatives (RSBr) obtained using the high-level G4 thermochemical protocol. For the species in this set, we find that the BDEs range from 178.0 kJ mol–1 (F3CSSBr) to 239.5 kJ mol–1 (HC(=NH)SBr). We have additionally reported molecule and radical stabilization enthalpies for all species, allowing for insights to be gained as to the effect of substituents in both the sulfenyl bromide reactants and the sulfur-centered radical products. In addition, we have also reported the BDEs of six sufinyl bromides (RS(=O)Br) and six sulfonyl bromides (RSO2Br). For the sulfinyl bromides, the BDEs range from 156.6 kJ mol–1 (F3CS(=O)Br) to 173.8 kJ mol–1 (tBuS(=O)Br), whilst for the sulfonyl bromides, the BDEs range from 211.0 kJ mol–1 (F3CSO2Br) to 226.2 kJ mol–1 (FSO2Br).
KW - Bond dissociation enthalpy
KW - Bromide
KW - G4 theory
KW - Stabilization enthalpy
KW - Sulfenyl
UR - http://www.scopus.com/inward/record.url?scp=85085603855&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85085603855&partnerID=8YFLogxK
U2 - 10.1016/j.cdc.2020.100430
DO - 10.1016/j.cdc.2020.100430
M3 - Article
AN - SCOPUS:85085603855
VL - 28
JO - Chemical Data Collections
JF - Chemical Data Collections
SN - 2405-8300
M1 - 100430
ER -