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• W2078389083 abstract "Abstract The reaction between the simplest nitro compound HNO 2 (hydrogen nitryl) and acetylene HCCH ‐ formally proceeding via 1,3‐dipolar cycloaddition ‐ has been studied by means of the B3LYP, MPW1K and MP2 methods. The energy barrier of 20.74 ÷ 32.91 kcal/mol is similar to Δ E a of the NNO + HCCH process but is essentially larger than computed for the reactions of HCCH with fulminic acid (HCNO) and NNCH 2 . Whole process is exothermic with the reaction energy: −10.87 ÷ −17.94 kcal/mol. An evolution of the chemical bonding has been analyzed by means of the Bonding Evolution Theory (BET) at the B3LYP/6‐31+G(d) and B3LYP/cc‐pVTZ levels. Two approximations of the reaction path have been considered, namely: the IRC and pseudo‐reaction paths. The reaction requires five steps and seven catastrophes of the fold and cusp type. A different effect of first fold catastrophe has been noticed. At the B3LYP/6‐31+G(d) level one of two nonbonding V i=1,2 (N) attractors is annihilated ( F ), meanwhile at B3LYP/cc‐pVTZ new V(N) attractor is created ( F † ). The chemical bonds are not formed/broken in TS. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011" @default.
• W2078389083 created "2016-06-24" @default.
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• W2078389083 date "2011-04-21" @default.
• W2078389083 modified "2023-10-18" @default.
• W2078389083 title "A mechanism of the 1,3-dipolar cycloaddition between the hydrogen nitryl HNO₂ and acetylene HCCH: The electron localization function study on evolution of the chemical bonds" @default.
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• W2078389083 doi "https://doi.org/10.1002/qua.22532" @default.
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