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Molodets [167]
3 years ago
11

Design a synthesis of 2-bromo-1-chloro-4-nitrobenzene from benzene or any mono-substituted benzene. Part 1 out of 6 choose the b

est option for the immediate precursor to the target molecule.

Chemistry
1 answer:
Oxana [17]3 years ago
6 0

2-bromo-1-chloro-4-nitrobenzene  is being synthesized in following sequence:

Step 1: Chlorination of Benzene:

                                                     This is Halogenation reaction of benzene. In this step benzene is reacted with Chlorine gas in the presence of lewis acid (i.e. FeCl₃). This results in the formation of Chlorobenzene as shown in red step below.

Step 2: Nitration of Chlorobenzene:

                                                          The chlorine atom on benzene has a ortho para directing effect. Therefore, the nitration of chlorobenzene will yield para nitro chlorobenzene as shown in blue step below.

Step 3: Bromination of 1-chloro-4-nitrobenzene:

                                                                               In this step bromination is done by reacting bromine in the presence of lewis acid. The chlorine being ortho para directing in nature and nitro group being meta directing in nature will direct the incoming Br⁺ (electrophile) to the desired location. Hence, 2-bromo-1-chloro-4-nitrobenzene is synthesized in good yield.

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The position is the strength of the magnetic field strongest is is the place where the magnetic field leaves, being point A.

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5 0
1 year ago
Which of the following are true for an element?       (i)Atomic number= number of protons + number of electrons      (ii)Mass nu
fredd [130]

Answer:

<em>ii</em><em> </em><em>and</em><em> </em><em>iv</em><em> </em>

Explanation:

atomic mass is the sum of protons and neutrons

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4 0
3 years ago
A number should be rounded up if
Vedmedyk [2.9K]

Answer:

C.) The number after it is between 5 and 9

Explanation:

If the digit to the right is less than five, you must leave the digit you want to round to as it is.

But, if the digit to the right is greater than or equal to five, you must increase the value of the digit you're rounding to by one. And any remaining digits before the decimal point become zeros, and any that are after the decimal point are dropped.

Hope this helps you out! : )

6 0
3 years ago
An
Pavel [41]
I think it is c but I’m not sure
6 0
3 years ago
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What is a limiting factor?
alukav5142 [94]
A limiting factor helps an organism outcompete other organisms i think that’s the answer
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