Search for structures, potential energy surfaces, and stabilities of planar BnP(n=1 similar to 7)
We have systematically explored and investigated the geometrical structures, stability, growth pattern, bonding character, and potential energy surface (PES) of the possible isomers of each cluster for planar BnP (n = 1 similar to 7) at the CCSD(T)/6-311+;G(d)//B3LYP/6-311+G(d) level. A large number of planar structures for the possible isomers of BnP (n = 1 similar to 7) and transition states are located. Isomers 1a similar to 7a of BnP are the lowest-energy structures and 2a, 4a, as well as 6a are more stable than their neighbors. For the lowest-energy structures (1a similar to 7a) of BnP, P atom lies at the apex and tends to form two B-P bonds with boron atoms. They exhibit planar zigzag growth feature or approximately spherical-like growth pattern. Results from molecular orbital analysis demonstrate that the formation of the delocalized pi MOs and the sigma-radial and sigma-tangential MOs plays a critical role in stabilizing the structures of lowest-energy isomers (2a similar to 7a) of BnP. Importantly, isomers 3a, 3c, 3d, 4a, 4b, 5b, and 5c of BnP are stable both thermodynamically and kinetically at the CCSD(T)/6-311+G(d)// B3LYP/6-311+G(d) level and detectable in laboratory, which is valuable for further experimental studies of BnP.
stability potential energy surfaces (pes) cluster dft isomerization