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SNI REACTION - Synthesis of fert - Pentyl Chloride* Purpose This experiment demonstrates the procedure for the synthesis of a tertiary alkyl halide...

Can someone please help me do Separation Scheme:


Its to show in the form of a simple flowchart, how a reaction product is isolated (separated) and purified from the mixture of product, by-products, and unreacted starting materials present at the end of a synthesis reaction. The connecting arrows usually include a solvent or reagent that has been added to the product mixture at that point, and most importantly, some method of separating components of the mixture is indicated.

My procedure/observations:

  1. Weight of the vial with 5mL of tert-pentyl alcohol = 14.277g
  2. Weight of the empty vial (after alcohol was poured into separatory funnel) = 10.247g
  3. Alcohol was poured into a 125ml separatory funnel
  4. 12ml of concentrated Hydrochloric acid was added to separatory funnel with the alcohol
  5. Added 10mL of water & washed, swirled, shooke the organic layer to excess acid.
  6. Tert-pentyl alcohol is the Alkyl Halide (organic layer in separatory funnel)
  7. Washed organic layer in separatory funnel with 10mL of water to remove any residual base
  8. 10mL of 5% Aqueous Sodium Bicarbonate was added to organic layer.
  9. Primary gas that's vented is Carbon dioxide, formed by reaction of basic Sodium Bicarbonate with the excess Hydrochloric acid in the aqueous solution:


HCl + Na+HCO3- --> Na+Cl- + H2CO3

H2CO3  ⇌ H2O + CO2


10.Dried the crude tert-pentyl chloride over with Anhydrous Sodium Sulfate

11.Weight of empty vial (before poured in crude tert-Pentyl Chloride) = 10.217g

12.Weight of vial with tert-Pentyl Chloride = 14.246g

13.SIMPLE DISTILLATION WAS NOT PERFORMED!

Screen Shot 2019-05-01 at 8.16.39 PM.pngSeparation scheme.png

Screen Shot 2019-05-01 at 8.16.39 PM.png

SNI REACTION - Synthesis of fert - Pentyl Chloride*
Purpose
This experiment demonstrates the procedure for the synthesis of a tertiary alkyl halide from a
tertiary alcohol via the SNI mechanism .
Introduction
left - Pentyl chloride can easily be prepared by allowing cert- ponty ! alcohol to react with
concentrated hydrochloric acid according to the following overall equation . Read your lecture
textbook for detailed information regarding the Sul mechanism by which this reaction occurs
and the competing El elimination mechanism by which organic alkene by- products may be
formed .
CH3
CH ]
CHICH 2 - C - OH
H - CI ( conc . )
- -
CHECH 2 - C - CI
H20 :
CH ]
CH ]
The reaction is conducted in a separatory funnel . As the reaction proceeds , the alkyl chloride
separates from the aqueous reaction mixture in which it is insoluble .
A small amount of an alkene , 2 - methyl - 2 - butene , may be produced as an elimination product in
this reaction . It can be removed by distilling the product mixture . If the alkene , rather than the
alkyl chloride , is the desired product from the competing substitution / elimination reactions
sulfuric acid would be used instead of hydrochloric acid . Since bisulfate . HISQ.. is a poor
nucleophile and would not form the corresponding alkyl hydrogen sulfate as a substitution
product , the major product would be from elimination . In this reaction , the IT is a good
nucleophile and so the substitution reaction is favored over the elimination reaction .\
Separatory funnel is used to separate immiscible liquids. when 2|
Procedure
immiscible liquids are placed in funnel, & lawyers are seen.
The denser solvent will be bottom layer. Most halogenated solvent`
1 . Reaction
are denser than water, won't mahalgenerated solvent's are less den's
left - Pentyl alcohol ( _ 5 ml ; will be issued to you in a small vial . Weigh the vialtrap and its
contents ( + . 001{) , recording the mass directly in your notebook at the balance . Pour the alcohol
into the 125 ml separatory funnel from your lab kit , using a glass funnel to avoid contaminating
the separatory funnel neck . Weigh the empty vialtrap and record it's mass .
Add _ 12- 13 ML of concentrated hydrochloric acid to the alcohol in the separator, funnel!
Again , use a glass funnel in the neck of the separatory funnel . Do not stopper the separator*
71

Separation scheme.png

SEPARATION SCHEME
At the end of the reaction , these substances were presumably present ( show as structures ) :

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