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- W2022144870 abstract "Ab initio investigations at the MP2 and CCSD(T) level with augmented double and triple zeta basis sets have identified various stationary points on the B+/nCH4, n = 1, 2 hypersurfaces. The electrostatic complexes show a strong variation in the sequential binding energy with De for the loss of one CH4 moleucle calculated to be 16.5 and 6.8 kcal mol−1 for the n = 1 and n = 2 complexes, respectively. The covalent molecular ion, CH3BH+, is found to have the expected C3v geometry and to be strongly bound by 84.0 kcal mol−1 with respect to B+ + CH4. The interaction of CH4 with CH3BH+ is qualitatively very similar to the interaction of CH4 with HBH+, however, the binding is only about 50% as strong due to the electron donating characteristic of the methyl group. Of particular interest are the insertion transition states which adopt geometries allowing the B+ ion to interact with multiple sigma bonds. In the n = 1 case, the interaction with two CH bonds lowers the insertion activation energy by about 25 kcal mol−1 from that expected for a mechanism involving only one sigma bond. For n = 2, B+ interacts with two CH sigma bonds from one CH4 and one CH sigma bond from the other CH4 leading to an additional activation energy decrease of about 15.7 kcal mol−1 relative to B+ + nCH4." @default.
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- W2022144870 date "2001-01-01" @default.
- W2022144870 modified "2023-09-27" @default.
- W2022144870 title "Sigma bond activation by cooperative interaction with s2 atoms: B++nCH4, n=1, 2" @default.
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- W2022144870 doi "https://doi.org/10.1039/b009223l" @default.
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