[uglepik]

As English is not my first language, I'm struggling with figuring out which word to use for the opposite of "excess". I might write:

DIPEA was added in excess (10 equiv).

but what about:

DMAP was added in ?? (0.1 equiv)

Sub-excess, deficit? Those sound silly... What do you say?

[408]

DMAP was added (0.1 equiv)


you do not need to say whether it is excess or not....

[orgopete]

Different wording can apply to different meanings, for example, limiting as in referring to the limiting reagent and the one that determines the yield of a reaction. Another common term is catalytic for the instance in which the reagent does not contribute to the product, but rather catalyzes its formation, such as an acid or DMAP which form an acylium intermediate that reacts faster than an acid chloride itself might.

[mamid]

DMAP was added in ?? (0.1 equiv)

Sub-excess, deficit? Those sound silly... What do you say?

Substoichiometric, catalytic (more appropriate in this case)...

[synthon]

I agree with using catalytic. 'Scarce' may also be used as an antonym, but not really best in this case.