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A tactic triad has three possible sequences, viz. (i) mm (ii) rr (iii) mr(or rm).

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A tactic triad has three possible sequences, viz. (i) mm (ii) rr (iii) mr(or rm).

(a) True

(b) False

I have been asked this question during an online exam.

My question is from Stereo Structure of Polymers in chapter Polymers of Engineering Chemistry I

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Best answer
Right option is (a) True

Best explanation: A tactic triad has three possible sequences, viz. (i) mm (ii) rr (iii) mr(or rm).  An isotactic triad (mm) is made up of two adjacent meso diads, a syndiotactic triad (rr) consists of two adjacent racemo diads and a heterotactic triad (rm) is composed of a meso diad adjacent to a racemo diad.

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