Chapter 13, Problem 13.26E

Determine the point groups of the following molecules. (a) Hydrogen peroxide, ${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$ (it is not planar.) (b) Allene, ${\text{CH}}_{\text{2}}=\text{C}={\text{CH}}_{\text{2}}$ (c) D-alanine (Its absolute stereochemistry can be found in any good organic or biochemistry textbook.) (d) L-alanine, and compare with part c above.