Chapter 9: Q.9-9-2P (page 265)
There are seven isomeric alkynes with the formula . Draw and name them.
Short Answer

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Chapter 9: Q.9-9-2P (page 265)
There are seven isomeric alkynes with the formula . Draw and name them.

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Draw structures corresponding to the following names:
(a)3,3-Dimethyl-4-octyne
(b)3-Ethyl-5-methyl-1,6,8-decatriyne
(c)2,2,5,5-Tetramethyl-3-hexyne
(d)3,4-Dimethylcyclodecyne
(e)3,5-Heptadien-1-yne
(f)3-Chloro-4,4-dimethyl-1-nonen-6-yne
(g)3-sec-Butyl-1-heptyne
(h)5-tert-Butyl-2-methyl-3-octyne
Question: Each of the following syntheses requires more than one step. How
would you carry them out?
(a)

b)

Occasionally, a chemist might need to invert the stereochemistry of an alkene—that is, to convert a cis alkene to a trans alkene, or vice versa. There is no one-step method for doing an alkene inversion, but the transformation can be carried out by combining several reactions in the proper sequence. How would you carry out the following reactions?
(a)
(b)
Which of the following bases could be used to deprotonate 1-butyne?
(a)
Show the terminal alkyne and alkyl halide from which the following products can be obtained. If two routes look feasible, list both.
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