Assignment:
Question 1. Determine the point group for each of the following molecules and items. Draw a clear picture of each molecule or item and show or clearly describe all the symmetry elements necessary to determine the point group. NOTE: Only the connectivity of the atoms determines symmetry, not the bond order between atoms.
a) phosphoruspentafluoride, PCl5
b) selenium tetrafluoride, SeF4
c) triiodide ion, I3-
d) ethane (eclipsed conformation)
e) nitrate ion, NO3-
f) hydrochloric acid, HCl
g) trans-SF4Cl2
h) cis-SF4Cl2
i) sulfur pentafluoride monochloride, SF5Cl
j) a thumb tack
k) sulfuryl chloride, SCl2O2,
l) Projection of the fx(x2-3y2) orbital. Assume the lobes of the orbital are coplanar and the z axis is perpendicular to the page.
m) nitrosyl chloride, NOCl
n) hexacyanocobaltate (III) anion, [Co(CN)6]3-
o) bis(benzene)chromium in a staggered ring conformation, (C6H6)2Cr