Methylene: A Paradigm for Computational Quantum Chemistry
摘要：
The year 1970 has been suggested as a starting date for the "third age of quantum chemistry," in which theory takes on not only qualitative but also quantitative value. In fact, each of the years 1960, 1970, 1972, and 1977 is of historical value in the unraveling of the structure and energetics of the CH(2) molecule, methylene. What took place for methylene, namely the establishment of credibility for theory, has subsequently taken place for many other molecules. Three important roles for quantitative theory are outlined: (i) theory precedes experiment; (ii) theory overturns experiment, as resolved by later experiments; and (iii) theory and experiment work together to gain insight that is afforded independently to neither. Several examples from each of the three classes are given.
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关键词：
inorganic, organic, physical and analytical chemistry ammonium compounds infrared spectra carbides molecular structure cations deuterium chemical reactions isotope effects hydrocyanic acid
DOI：
10.1126/science.231.4742.1100
被引量：
年份：
1986
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