Semiempirical quantum-chemical calculations are reported for the fullerenic structures C60, Si60, Ge60, N60; B36N24, B36P24, A136N24, A136P24; and various BnNn A new route towards B/N clusters is considered, being based on squares and hexagons. The pattern always requires six squares. The route can produce species of similar or even higher stability comparing to the conventional pentagon/hexagon pattern. Four particular stoichiometries emerge from the available AM1 computations: B12N12, B28N28, B36N36, and B36 N24.
Electronic and molecular structure calculations of 51 selected Yb@C84 isomers are presented. The obtained energies and structural parameters are used for calculation of the temperature dependence of Gibbs energies and the equilibrium composition of the isomeric mixture. Applied to the temperaturerange 1500–2000 K relevant for the conventional electric‐arc preparation technique, the prevailing isomers are identified and compared with the available experimental observations. An assignment of the experimentally unidentified one is also suggested.
The MP2 perturbation treatment with the 6-31G* basis set has been applied to linear, cyclic, and polyhedral structures of Cn, n = 6-13, esp. to C12 in this report. While the linear and cyclic species can co-exist, polyhedral ones are too high in energy. Preliminary results on C8H (related to diffuse interstellar bands) are reported, too.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.