Kinetic Isotope Effect is a Sensitive Probe of Spin State Reactivity in C−H Hydroxylation of N,N-Dimethylaniline by Cytochrome P450

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Abstract

This paper presents DFT calculations of C-H hydroxylation of N,N-dimethylaniline by Compound I (Cpd I) of cytochrome P450. The reaction involves two processes nascent from the two spin states of Cpd I, the low-spin (LS) and high-spin (HS) states. The calculations demonstrate that the kinetic isotope effects (KIEs) of the two processes are very different, and only KIELS fits the experimental datum. As such, KIE can be a sensitive probe of spin state reactivity.

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