Stability Rules of Main-Group Element Compounds with Planar Tetracoordinate Carbons
Zhang, Congjie（Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Sch Chem & Mat Sci）
Jia, Wenhong（Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Sch Chem & Mat Sci）
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We have investigated the structures, stabilities, aromaticities, and Wiberg bond indices of four types of compounds (8-like, trapezia, umbrella-like, and quadrangle) containing planar tetracoordinate carbon (ptC), and the stability rules for the compound with ptC were concluded on the basis of extensive calculations. Generally, the stability or viability of compound with ptC strongly depends on the number of three-membered ring and conjugated three-membered ring, as well as pi electrons. These rules can be successfully used to identify the stability of other compounds reported in previous studies. On the basis of these rules, eight stable compounds with planar tetracoordinate nitrogen (ptN) are successfully constructed.