Assertion: deuterium's effect | /r/HasProperty | useful
Facets:
value: very
type: DEGREE
value: for elucidating reaction mechanisms
type: PURPOSE
Source sentences:
text: A secondary kinetic isotope effect is observed when no bond to the isotopically-labeled atom in the reactant is broken or formed.:427 Secondary kinetic isotope effects tend to be much smaller than primary kinetic isotope effects; however, secondary deuterium isotope effects can be as large as 1.4 per deuterium atom, and techniques have been developed to measure heavy-element isotope effects to very high precision, so secondary kinetic isotope effects are still very useful for elucidating reaction mechanisms.