Adverb
sterically (not comparable)
In a steric manner
In sterically hindered amines, as in the case of trimethylamine, the protonated form is not well-solvated. Source: Internet
Joule, p. 129 citation citation Pyridine derivatives wherein the nitrogen atom is screened sterically and/or electronically can be obtained by nitration with nitronium tetrafluoroborate (NO 2 BF 4 ). Source: Internet
This is because glycine's R group is only a hydrogen and so is not as sterically constrained. Source: Internet