Lindemann’s hypothesis

According to Lindemann s hypothesis, the activation by collision can still give rise to first order kinetics if the activated molecules decompose only slowly compared to the rate at which they are deactivated. There is a time-log between the moment of activation and the moment of decomposition and in such a case, a stationary concentration of the activated molecules gets built up. Since the activated molecules will be in equilibrium with the normal molecules, their concentration will be proportional to that of normal molecules. The activated molecules disappear through two parallel processes, i.e. through deactivation and decomposition, represented as follows ... 

Lindemann s hypothesis, as later interpreted and developed by C. N. Hinshelwood (1897-1967) and others, is as follows. In a unimolecular process an energized molecule A is first formed by a collision between two molecules of the reactant A ... 

Lindemann s Hypothesis Table 6.3 Critical amplitudes of atomic vibrations determined by different methods 339... 

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