(a) Use a molecular orbital program or input and output from software supplied by your instructor to construct a molecular orbital energy-level diagram to correlate the MO (from the output) and AO (from the input) energies and indicate the occupancy of the MOs (in the manner of Fig. 2.17) for one of the following molecules: HF (bond length 92 pm), HCl (127 pm), or CS (153 pm). 

(b) Use the output to sketch the form of the occupied orbitals, showing the signs of the AO lobes by shading and their amplitudes by means of size of the orbital.

Figure 2.17.

Energy 20 11g 20 11 10 10g Li Be B 2 C # N # 0 F 4 -20 atriu -20 9 -10 -10