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Chemistry LibreTexts

Point Groups 1 (Worksheet)

  • Page ID
    11075
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    Section: _____________________________

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    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