TY - JOUR
T1 - The internal relation between quantum chemical descriptors and empirical constants of polychlorinated compounds
AU - Fei, Jiangchi
AU - Mao, Qiming
AU - Peng, Lu
AU - Ye, Tiantian
AU - Yang, Yuan
AU - Luo, Shuang
N1 - Publisher Copyright:
© 2018 by the authors.
PY - 2018/11/10
Y1 - 2018/11/10
N2 - Quantum chemical descriptors and empirical parameters are two different types of chemical parameters that play the fundamental roles in chemical reactivity and model development. However, previous studies have lacked detail regarding the relationship between quantum chemical descriptors and empirical constants. We selected polychlorinated biphenyls (PCBs) as an object to investigate the intrinsic correlation between 16 quantum chemical descriptors and Hammett constants. The results exhibited extremely high linearity for ∑σ+ o,m,p with Qxx/yy/zz, α and EHOMO based on the meta-position grouping. Polychlorinated dibenzodioxins (PCDDs) and polychlorinated naphthalenes (PCNs) congeners, as two independent compounds, validated the reliability of the relationship. The meta-substituent grouping method between ∑σ+ o,m,p and α was successfully used to predict the rate constant (k) for •OH oxidation of PCBs, as well as the octanol/water partition coefficient (logKOW) and aqueous solubility (−logSW) of PCDDs, and exhibited excellent agreement with experimental measurements. Revealing the intrinsic correlation underlying the empirical constant and quantum chemical descriptors can develop simpler and higher efficient model application in predicting the environmental behavior and chemical properties of compounds.
AB - Quantum chemical descriptors and empirical parameters are two different types of chemical parameters that play the fundamental roles in chemical reactivity and model development. However, previous studies have lacked detail regarding the relationship between quantum chemical descriptors and empirical constants. We selected polychlorinated biphenyls (PCBs) as an object to investigate the intrinsic correlation between 16 quantum chemical descriptors and Hammett constants. The results exhibited extremely high linearity for ∑σ+ o,m,p with Qxx/yy/zz, α and EHOMO based on the meta-position grouping. Polychlorinated dibenzodioxins (PCDDs) and polychlorinated naphthalenes (PCNs) congeners, as two independent compounds, validated the reliability of the relationship. The meta-substituent grouping method between ∑σ+ o,m,p and α was successfully used to predict the rate constant (k) for •OH oxidation of PCBs, as well as the octanol/water partition coefficient (logKOW) and aqueous solubility (−logSW) of PCDDs, and exhibited excellent agreement with experimental measurements. Revealing the intrinsic correlation underlying the empirical constant and quantum chemical descriptors can develop simpler and higher efficient model application in predicting the environmental behavior and chemical properties of compounds.
KW - Hammett constant
KW - Meta-position
KW - Prediction model
KW - Quantum chemical descriptor
UR - http://www.scopus.com/inward/record.url?scp=85056518993&partnerID=8YFLogxK
U2 - 10.3390/molecules23112935
DO - 10.3390/molecules23112935
M3 - Journal article
C2 - 30423794
AN - SCOPUS:85056518993
SN - 1420-3049
VL - 23
JO - Molecules
JF - Molecules
IS - 11
M1 - 2935
ER -