from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Describing identical atoms or groups attached to the same atom in a molecule
from the GNU version of the Collaborative International Dictionary of English
- adj. A pair.
from The Century Dictionary and Cyclopedia
- n. A pair.
Sorry, no etymologies found.
If a pair of geminal protons (CH2) cannot be interchanged through a symmetry operation of the molecule, then these protons are diastereotopic and are NOT chemically equivalent. e.g. the β-methylene protons of amino acids where the methylene group is attached to chiral C