| Title: | Interaction topologies of the SO chalcogen bond: the conformational equilibrium of the cyclohexanolSO(2) cluster |
| Author(s): | Jin Y; Saragi RT; Juanes M; Feng G; Lesarri A; |
| Address: | "School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd 55, Chongqing, 401331, China. fengg@cqu.edu.cn and Departamento de Quimica Fisica y Quimica Inorganica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain. alberto.lesarri@uva.es. Departamento de Quimica Fisica y Quimica Inorganica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain. alberto.lesarri@uva.es. School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd 55, Chongqing, 401331, China. fengg@cqu.edu.cn" |
| ISSN/ISBN: | 1463-9084 (Electronic) 1463-9076 (Linking) |
| Abstract: | "The conformational landscape of the cyclohexanolSO2 cluster was revealed in the gas phase using chirped-pulsed broadband rotational spectroscopy and quantum chemical calculations. Four isomers stabilized by a dominant SO chalcogen bond and cooperative C-HO[double bond, length as m-dash]S and O-HO[double bond, length as m-dash]S secondary weak hydrogen bonds were observed, with a near-parallel orientation of the S[double bond, length as m-dash]O and O-H bonds. Isomers formed by equatorial-gauche cyclohexanol are more stable than the isomers containing axial cyclohexanol. The multiple conformations of cyclohexanol and the versatile binding properties of SO2, simultaneously operating as nucleophile and electrophile through its pi-holes and non-bonding electrons lead to a complex conformational behavior when the cluster is formed. The long (2.64-2.85 A) attractive SO interaction between SO2 and cyclohexanol is mainly electrostatic and the contribution of charge transfer is obvious, with an NBO analysis suggesting that the strength of the SO interaction is nearly two orders of magnitude larger than the hydrogen bonds. This study provides molecular insights into the structural and energetic characteristics that determine the formation of pre-nucleation clusters between SO2 and a volatile organic compound like cyclohexanol" |
| Notes: | "PubMed-not-MEDLINEJin, Yan Saragi, Rizalina T Juanes, Marcos Feng, Gang Lesarri, Alberto eng England 2021/05/01 Phys Chem Chem Phys. 2021 May 12; 23(18):10799-10806. doi: 10.1039/d1cp00997d" |
