Question

Fill the blanks with the proof of choices given: (a) The four pyrrole rings in the porphyrin head are linked by (b) Carotenoids have....... (c) Chlorophy II-b has......... (d) Chlorophy II-a has.. (1) Canjugate double bonds. (2) Formyl (-1CHO) group, (3)-CH3 group, (4) Methene bridges (-CH=)

• A. (4) (1) (2) (3)
• B. (1) (2) (4) (3)
• C. (4) (3) (1) (2)
• D. (1) (2) (3) (4)

Answer 1

Answer:

A. (4) (1) (2) (3)

Chlorophyll has a tadpole-like configuration. It has a head called porphyrin and a tail made up of long chain alcohol called phytol. Porphyrin head is made up of four pyrrole rings which are linked by methine bridges. Conjugated double bonds are double bonds in an organic structure that alternate with single bonds A formyl group (―CHO) can be put onto an aromatic ring by several methods (ArH → ArCHO). In one of the most common of these, called the Reimer-Tiemann reaction