Melbourne University Mathematics and Statistics Society

Solution for 4.2 VSEPR (Answer = TETRAHEDRANE)

Identify the shape of each chemical compound. Some are very clear-cut (e.g. Benzene must be an O), while others may be ambiguous (C and U might look the same).

There are additional brackets in the middle, which might hint that we can form words before and after the brackets. Indeed, this helps us restrict the choices and we can obtain:

ClueShape
Chlorine trifluoride T
1,2-dimethyl cyclohexane R
Beryllium fluoride I
Z But-2-ene C
Aluminium trichloride Y
Z 1,2­-dichloroethene C
Chlorine dioxide L
Benzene O
[ Propadiene. 1
Xenon difluoride. 1
Oxazine. 0
Pyridine 0
( E But-2-ene, 2
2-Methyl-2-butene ) ] 4
Naphthalene B
Z 1,2-dibromoethene U
Bromine trifluoride T
1,2­dimethyl cyclopropane A
E 1-Bromo-2-chloroetheneN
Nitrogen trichloride E

where TRICYCLO[1.1.0.02,4]BUTANE is the systematic IUPAC name for TETRAHEDRANE.