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Chemistry LibreTexts

Point Groups 1 (Worksheet)

Name: ______________________________

Section: _____________________________

Student ID#:__________________________

Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1. Using the alphabet above, answer the following:

  1. how many letters have a mirror plane?
  2. how many letters have more than one mirror plane?
  3. how many letters have a rotational axis?
  4. which letter has the highest ordered rotational axis?
  5. which letters have an inversion center?

 

2.  Determine all of the symmetry elements in each of the following:
 

your left shoe eclipsed ethane
\(Fe(CO)_5\) \(CHF_3\)
\(CF_2H_2\) \(CFH_3\)
\(IBr_4^+\) \(COS\)
\(IBr_4^-\) \(SO_2\)
\(HF\) \(F_2\)
\(BFCl_2\) \(BFClBr\)
\(CoCl_3(OH_2)^-\)   (excluding hydrogens) \(Cu(CN)_3\)       (planar)

 

3. Determine the point group for each of the following:(point group flow chart)
 

\(SF_6\)​ eclipsed ethane
\(CH_4\) \(CHF_3\)
\(CF_2H_2\) \(CFH_3\)
\(IBr_4^+\) \(COS\)
\(IBr_4^-\) \(SO_2\)
\(HF\) \(F_2\)
\(BFCl_2\) \(BFClBr\)
\(CoCl_3(OH_2)^-\)   (excluding hydrogens) \(Cu(CN)_3\)       (planar)
\(Ni(CO)_4\) \(Fe(CO)_5\)
your left shoe a round doorknob