Interaction of a conjugated polyene - retinal with a protein - opsin enables us

Question

Interaction of a conjugated polyene - retinal with a protein - opsin enables us to see light Which of the following is the process to thank for it? Light converts one enantiomer to another, which is similar in shape Light converts one enantiomer to another, which is very different in shape Light converts one diasteroeomer to another, which is similar in shape Light converts one diastereomer to another, which is very different in shape Light increases transparency of the retinal-opsin complex Which of the following compounds is aromatic? Which of the following reaction products would undergo subsequent nitration mostly to the meta-position? Polymerization of which compound will produce a polymer with the following ? -Butene 2, 3-Pentadiene Butane 1, 3-Butadiene 2-Methyl-1, 3-butadien

Explanation / Answer

Q no. 21) Compound A i s aromatic because 6 delocalised electrons.

According to Huckel rule 4n+2 delocalised electrons are aromatic.

Q no. 22) Compound D will go meta substitution because benzene ring is having electron withdrawing keto group. Other three compounds are having electron donating groups.

Q no. 23)2-methyl 1,3 butadiene give above polymer.

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