Question

please help with these chemistry problems

2. (5 points) Why does this reaction occur via a Si1 pathway and not via a Si2 pathway? 3. (5 points) In general are SN1 reactions stereospecific? Why or why not? 2 5.(5 points) Why do carbon substituents stabilize a carbocation and destabilize a carbanion? 6. (5 points) The mass spec of your product has a base peak at 77 draw what this fragment looks like. What would explain the peak at 79. (you will have to read ahead into Chapter 14) 8. (10 points) What was the purpose of adding aqueous sodium bicarbonate during the workup phase? Chemically what happened inside the sep funnel when you added the sodiume bicarbonate? (Hint: you will have to include some chemical reactions to properly answer the question) 9. (5 points) The reaction mechanism for the svnthesis of 2-chloro-2-methylbutane from 2- methyl-2-butanol is below. Draw in all the reaction arrows to illustrate the flow of electrons in this reaction. CH3 CH3 CH3CH2-C-CH3+ H CH,CH2-C-CH3 OH H CH3 CHy CH,CH2-C-CH slow CH,CHа-с- сн, + н,о CH3 CH3 CH3CH2-C-CH3 +Cfast CH CH2-C-CH 10. (10 points) In this experiment, 5.0mL of saturated sodium chloride (i.e., brine) was added to your extract to remove water. Why is salt water, rather than pure water, used to remove water from the organic layer?

Answer 1

Ans 2 :

SN1 are nucleophilic substitution reactions that occur in two steps. The rate determining step is the 1st step of the reaction that leads to the formation of a carbocation. This carbocation then gets attacked by a nucleophile to form the desired product.

So these reactions favour tertiary halides more than secondary and primary halides. Here the reactant is tertiary , so SN1 reaction is favoured.