Answer the following about molecular containers, which can stabilize unfavourable transition states, for 10 points each.
[10h] Carcerands are completely closed molecular containers and were first used to mediate the synthesis of this highly unstable molecule. This is the lightest antiaromatic molecule, and can dimerize to form Dewar benzene.
ANSWER: 1,3-cyclobutadiene [or [4]annulene; or cyclobuta-1,3-diene]
[10m] Another molecular container, cucurbituril, has been used to carry out a catalysis-resistant one of these reactions. This reaction creates a 6-membered ring and usually forms the endo product.
ANSWER: Diels–Alder reaction [or DA reaction]
[10e] Molecular containers often accelerate this quantity, which is how fast a reaction proceeds. Catalysts often increase this quantity, which is calculated using a constant denoted lowercase k.
ANSWER: reaction rate [reject “rate constant” or “reaction rate constant”]
<UCSD A, Chemistry>