Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective chemistry  Of a 
chemical reaction , involving two simultaneous changes inbonding to the same face of a common centre (or related centres) of a molecular fragment. 
Etymologies
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Examples
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C-11 followed by suprafacial transfer of this hydrogen to C-9 as shown by conversion of C-9-deuterated substrate isotopologs.
 
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