TBS_Amelia's definitions

Duckbutt

A depiction of tetrahedral geometry, especially in the discussion of chiral centers

Bromochlorofluoromethane can take on both R and S configurations, depending upon whether the Bromine, Chlorine, and Flourine increase in atomic number clockwise or counterclockwise around the central carbon; the Hydrogen is at the duckbutt.

by TBS_Amelia February 24, 2008