In the CRC Handbook of Chemistry and Physics, the boiling point listed for 1, 3-
ID: 1065477 • Letter: I
Question
In the CRC Handbook of Chemistry and Physics, the boiling point listed for 1, 3-diiodopropane is: 110^19. What does the superscript for this value refer to? In a vacuum distillation, it is not unusual to collect pure liquid over a 10 - 20 degree C temperature range. Why is the boiling point range in a vacuum distillation typically much larger than the boiling point range in a simple distillation? Is a single solvent, or a mixed solvent system, used in this experiment for the recrystallization of the reaction product? Why does the rate of an E_1 reaction depend on the concentration of the substrate, but not the concentration of the base? Explain your reasoning. Why does the rate of an E_2 reaction depend on both the concentration of the substrate and the concentration of the base? Explain your reasoning.Explanation / Answer
Boililng point values at reduced pressure given with a superscript.superscript indicates that the pressure in mmHg.
Simple Distillation, principally to separate two or more components of the liquid under the boiling point difference is much different. Vacuum distillation, separating the two component at a very high boiling point, the method used is to reduce the surface pressure is lower than 1 atm, which is also a low boiling point, and in the process temperature used to mendistilasinya need not be too high.
Elimination Reactions - E2 Reactions are Concerted reactions.that means all bonds form and break at same time.therefore it’s rate depend on concentration of both base and substrate.
Elimination Reactions – E1 Reactions are Non-concerted - has carbocation intermediate - favoured for tertiary leaving groups. rate depends on concentration of only the substrate.because rate only depends on the bond formation reaction of the substrate.