Great Deal! Get Instant $10 FREE in Account on First Order + 10% Cashback on Every Order Order Now

lab report

1 answer below »
lab report
image-7-paqxbsy3-1k2sspwz.png img0309-aw2iavr5-zgyqo5t2.jpg img0310-yqpnvire-5ca2jjb3.jpg img0311-gszfss0w-xypsam2o.jpg
Answered Same Day Nov 17, 2021

Solution

Yasodharan answered on Nov 18 2021
146 Votes
Alkenes – Synthesis of Cyclohexenes
Objective:
The synthesis of alkenes is performed by dehydrating subsequent alcohol group using strong acid followed by strong neutralising step, in common concentrated phosphoric acid or sulphuric acid is used for dehydration step.
The above step shows the elimination reaction where leaving group (X) departs with electron (bonding) results in abstraction of adjacent ca
on with absence of bonding electron. (hydrogen in common) and in general classified as elimination (H+/X-) loss. The mechanism commonly follows three methods/steps in common through E1, E2 & E1CB mechanism to get alkene as final product.
Step 1: The ca
ocation is formed by leaving group X with departing electrons results in formation of intermediate ca
ocation which loses proton in subsequent step to form alkene a double bond product through E1 step (first-order elimination).
Step 2: The second method/step is losing both proton (H+) and X- simultaneously through one-step mechanism commonly called as E2 (second-order elimination) where B(base) gets abstracted by H+ (proton).
Step 3: The third possible mechanism is abstraction of proton by base prior with elimination of X to form alkene product with ca
anion as intermediate product.
The objective of this experiment is to synthesis cyclohexene by dehydration of cyclohexanol using concentrated phosphoric acid which undergoes E1 mechanism (ca
ocation intermediate).
The proton from phosphoric acid (H+) protonates oxygen atom in cyclohexanol to form oxonium ion to ca
ocation by decomposition of hydroxyl ion to water molecule. The ca
ocation results in formation of cyclohexene via elimination of proton (adjacent) since it cannot rea
ange to stable ca
ocation.
The azeotropic distillation...
SOLUTION.PDF
SOLUTION.PDF

Answer To This Question Is Available To Download

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here
Attach File