Inorganic ChemistryI. How many planes of symmetry does benzene have? Locate them in a drawing.
II. Draw the ammonia molecule, find the symmetry elements, and list all symmetry
operations.
III. The rotations of ammonia form a subgroup of order 3. Write out the multiplication table.
IV. Assign point groups to the following molecules and ions.
P
P P
P P
Cr
Br
Br
Cl
Cl
Cl
Cl
Cr
Br
Br
Cl
Cl
4
V. Assume cyclobutadiene is a square-planar molecule. Find the locations of all C2 axes and planes of symmetry consistent with the characters assigned below for thefour carbon-carbon bonds.
D4h
E
2C4
C2
2C2
2C2
i
2S4
sh
2 sv
2 sd
GCC
4
0
0
0
2
0
0
4
0
2
VI. The complex Ru(PPh3)3(CO)2 (1) shows a single band in the C=O stretching region of the IR spectrum. On the other hand, the related complex Ru(PPh3)2(CO)2L (2)incorporates a different phosphine L and exhibits two relatively intense C=O stretching bands. If both complexes are effectively trigonal bipyramidal, deduce likelystructures for each compound. Use group theoretical methods to support your answer.
Compound
?(CO), cm-1
1
1905
2
1888, 1941
VII. Consider the three p orbitals px, py, and pz, which are degenerate for an isolated atom M. If M is surrounded by several X atoms, the latter impose anelectrostatic field that can lift the degeneracy of the p orbitals. According to character tables, how do the p orbitals split in each of the following structures?
a) MX3, pyramidal
b) MX4, tetrahedral

The papers should each be a summary in your own
words of a recent (in calendar year 2015 or 2016) publication in the ACS journal Inorganic Chemistry (available on-line at Roosevelt campus computers, see: pubs.acs.org). Other journals, both ACS and non-ACS, respectively such as J. Am. Chem. Soc. or Science, may be used provided the article is on an authentically inorganic chemistry related topic.

Your selection of article must be approved by the instructor to ensure this point and that the appropriate subject area is covered, divided into two in either of two ways as follows: One paper must be on an article describing research on main-group (s or p block) chemistry and the other paper must be on an article describing research on transition metal (d or f block) chemistry. An alternative division is that one paper must be on solid-state (materials) chemistry (i.e., extended structures), featuring any non-hydrocarbon (i.e., not “organic”) materials, such as oxides, etc., and the other paper must be on discrete molecules: coordination chemistry (including organometallics) or biological inorganic chemistry (e.g., studies on metalloproteins or model compounds). You need not understand everything in the article, but explain the researchers’ goals, methods, conclusions, and how the paper enhanced your understanding of inorganic chemistry and was related to the material in the course. Note that the articles must be original (primary) research (Articles or Communications); review type articles (secondary research), which go by various names, including Accounts, Forums, Perspectives, etc., are not appropriate.