steric-approach control
Control of @S05991@ of a reaction by @S06000@ towards attack of the @R05190@, which is directed to the less hindered face of the molecule. Partial bond making is strong enough at the @T06468@ for steric control to take place. This suggests that the @T06468@ should not be close to products.
See also:
product development control
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1168 [Terms] [Paper]