1) Below is a “ball and stick" representation of the molecule NH3. Assume all bond lengths and angles are equivalent such that the molecule is an idealized trigonal рyramid. H H H a) Using standard conventions draw all listed objects and symmetry elements with proper labels. You may draw multiple views to make it easier to show different symmetry elements. (Make sure you re-draw the coordinate system for each new view) i) A cartesian coordinate system ii) The principal axis (name it properly) iii) One of the mirror planes (name it properly) b) List all unique symmetry operations present for this molecule. If there are redundant operations, include only the standard one (e.g. C = E, so write E,not C). c) What is the point group of this molecule?

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1) Below is a “ball and stick" representation of the molecule NH3. Assume all bond
lengths and angles are equivalent such that the molecule is an idealized trigonal
pуramid.
H
H
H
a) Using standard conventions draw all listed objects and symmetry elements
with proper labels. You may draw multiple views to make it easier to show
different symmetry elements. (Make sure you re-draw the coordinate system
for each new view)
i) A cartesian coordinate system
ii) The principal axis (name it properly)
iii) One of the mirror planes (name it properly)
b) List all unique symmetry operations present for this molecule. If there are
redundant operations, include only the standard one (e.g. C =
E, so write E,not C).
c) What is the point group of this molecule?
d) What is the point group if:
i) One H is removed?
ii) Two Hs are removed?
Transcribed Image Text:1) Below is a “ball and stick" representation of the molecule NH3. Assume all bond lengths and angles are equivalent such that the molecule is an idealized trigonal pуramid. H H H a) Using standard conventions draw all listed objects and symmetry elements with proper labels. You may draw multiple views to make it easier to show different symmetry elements. (Make sure you re-draw the coordinate system for each new view) i) A cartesian coordinate system ii) The principal axis (name it properly) iii) One of the mirror planes (name it properly) b) List all unique symmetry operations present for this molecule. If there are redundant operations, include only the standard one (e.g. C = E, so write E,not C). c) What is the point group of this molecule? d) What is the point group if: i) One H is removed? ii) Two Hs are removed?
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