title: Tetrel bonds between PySiX3 and some nitrogenated bases: Hybridization, substitution, and cooperativity.
abstract: Ab initio calculations have been performed to study the influence of hybridization, substitution, and cooperativity on the tetrel bond in the complexes of PySiX3 (Py=pyridine and X=halogen). The tetrel bond becomes stronger in the order of p-PySiF3⋯NCH(sp)<p-PySiF3⋯NHCH2(sp(2))<p-PySiF3⋯NH3(sp(3)). The electron-donating group in the electron donor strengthens the tetrel bond, and this effect is mainly achieved through electrostatic and polarization interactions. Tetrel bonding displays cooperative effects with triel bonding and chalcogen bonding, characterized by shorter binding distances and greater electron densities. The cooperative effects between triel/chalcogen bond and tetrel bond have been analyzed by molecular electrostatic potentials and charge transfer. Energy decomposition indicates that many-body effects are mainly caused by polarization energy. The geometries of Si⋯N interaction and its applications in crystal materials have been characterized and evidenced by a CSD research.
authors.affiliation: The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China.
authors.forename: Mingxiu
authors.initials: M
authors.lastname: Liu
authors.affiliation: The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China. Electronic address: liqingzhong1990@sina.com.
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Li
authors.affiliation: The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China.
authors.forename: Wenzuo
authors.initials: W
authors.lastname: Li
authors.affiliation: The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Cheng
mesh_terms: D004583:Electrons; D006219:Halogens / Q000737:chemistry*; D008958:Models, Molecular; D011725:Pyridines / Q000737:chemistry*; D011789:Quantum Theory; D055672:Static Electricity; D013816:Thermodynamics
chemical_list: D006219:Halogens; D011725:Pyridines
keywords: Synergistic effects; Tetrel bonds; Triel bonds