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不同的同位素分子在化学反应速度上的差异是动力学同位素效应。当水和重水与金属反应时有: H_2O+Me→H_2+MeO,HDO+Me→HD+MeO。(1)式中k和k~*为化学反应速度常数。动力学同位素效应值α等于k/k~*,在定温下α为常数。对于反应(1)有
Different isotopes in the chemical reaction speed difference is the kinetic isotope effect. When water and heavy water react with metals: H_2O + Me → H_2 + MeO, HDO + Me → HD + MeO. (1) where k and k ~ * are chemical reaction rate constants. The kinetic isotope effect α is equal to k / k ~ * and α is constant at constant temperature. For the reaction (1) there