Question

BORNEOL OXIDATION: SYNTHESIS OF CAMPHOR

3. Leaving your camphor product in an uncapped container is bad, since camphor will easily

sublime. Define this term (in chemistry; not the adjective or the band). What other

somewhat cold substance used in this week’s experiment does the same thing?

4. Clearly show the incorporated “isoprene” units present in the natural product humulene

(using the method we showed in class). What type of terpene is this? (hemiterpene,

terpene, sesquiterpine, diterpine, etc).

5. Repeat this exercise for the compound cembrene A.

Answer 1

Q1.
Sublimation is the physical change by which a solid directly turns to its gas phase without passing through the intermediate liquid phase.The process may be clearly defined by using a phase diagram; it occurs at temperatures and pressures below the 'triple point' in a phase diagram. Substances such as CO₂, naphthalene etc.sublime very easily at normal conditions of temperature and pressure.