Asked Dec 30, 2019

(a) What two components are needed to prepare para red by azo coupling? (b) What two components are needed to prepare alizarine yellow R?


Expert Answer

Step 1

Both the benzene rings in red compound have substituent’s, but OH is a stronger electron donor.  In determining the two starting materials, the diazonium ion must be bonded to the ring that is not bonded to OH.


Chemistry homework question answer, step 1, image 1
Step 2

Thus two components needed to prepare par...

Chemistry homework question answer, step 2, image 1

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