Benzene structure Flashcards
What is the shape of benzene?
Planar, regular hexagon with bond angles of 120 degrees.
What is the bond length between CC bonds in benzene?
Intermediate length between carbon carbon single bond and carbon carbon double bond.
What happens to the 4th electron in the P-orbital of each carbon in benzene?
It delocalises to form rings of electron density above and below the hexagon.
What makes benzene more stable than the theoretical molecule cyclohexa-1,3,5-triene?
The delocalisation of the p electrons.
Which of bond making and bond breaking is exothermic?
Bond making is exothermic. Bond breaking is endothermic.
What does the enthalpy of hydrogenation of benzene being more positive than cyclohexa-1,3,5-triene tell you?
That benzene is more stable as more energy is taken in because breaking the bonds requires more energy (bond breaking is endothermic).
Is benzene soluble in water? Why?
No, because it is nonpolar.
