15 February 2008
Vol 319, Issue 5865

About The Cover

Cover image expansion

COVER A depiction of the interaction of an excess electron with the hydrogen-bonded complex NH3...HCl, which induces formation of the ionic pair NH4+Cl__ solvated by the excess electron. The image shows the structures of three possible systems and highlights the areas that correspond to 10%, 30%, and 50% of the excess electron. See page 936 .

Illustration: Maciej Haranczyk