Due Tuesday, September 29.

Note that exercises are within the chapter, and not at the end of the chapter.

Chapter 4: Exercises: 4.9(D2h); 4.11(D4h), 4.12(C3v) 4.13(C4v); 4.14(D5h)

The orientation of the molecule in exercise 9 is assigned as follows:

If there are three C₂ axes, the one with the largest number of atoms unmoved by a C₂ operation is z. If there is only one C₂ axis, that is z.  For N2O4, the z axis goes through the nitrogen atoms.

Once z is defined, the y axis is defined as the axis of the remaining two axes which has the larger number of atoms unmoved by the s symmetry operations.  This would be the axis within the molecular plane and perpendicular to the bond axis.

The x axis is the remaining axis.