4. Draw and list all the symmetry elements, and determine the point groups for the following molecules. Draw the figures and indicate where the symmetry elements are. (a) Cyclohexane (chair conformation) H. (b) Tetrachloroallene (c) Diborane H. H (d) Phosphorus pentafluoride F -F

Give the point groups of the following molecules:

Please don't provide handwritten solution ....

1. Pyridine (shown below) is a planar delocalized molecule Similar to benzene H 1) Identify its principal rotation axis (draw it it on picture) 11) Determine its point group and give your resoning / explainin H H C IC H 。 H and label 1211

For each of the following molecules (1) list all the symmetry elements and (ii) provide the point group. (a) (b) (c) (d) 4. For each of the following molecules (i) list all the symmetry elements and (ii) provide the point group. b a a a Melilla (a) b DIII.. M-6 (b) b b (c) 6 a (d) D

For selected molecule identify: a) all the symmetry elements present b) appropriate point group c) which of the symmetry elements listed in (a) are sufficient to determine the point group.