Draw the structure of 4.4-Dimethi - 1 - pentyne Provide IUPAC Name for the follo

Question

Draw the structure of 4.4-Dimethi - 1 - pentyne Provide IUPAC Name for the following structure. Please circle the terminal alkyne among me following four compounds: 3-Mothyl - 2 - hexyne 3-Mothyl- 1 -hexene 5-Molhyl-1-hexyne 2-Hexyne Which one to the product of the following reaction? 2-Butyne + 1) H_2^SO_4. 2) H_2^O please draw the structure of product of the reaction. 1-Butyne + 2HBr rightarrow What kind of alcohol would be formed from the following reaction? 1-Hoxyne + 1) NaNH_2, 2) acetone, 3) H_2^O rightarrow. 1 degree alcohol 2 degree alcohol 3 degree alcohol enol Please draw the structure of product of the following reaction. 3-Hexyne + H2 with Lindlar Catalyst rightarrow Please draw the structure of product of the following reaction 3-Hexayne + 2 Na, with NH_3(Liq.) rightarrow

Explanation / Answer

Q2.

longest chain including triple bond:

6 carbons

3rd carbon = methyl

4th carbon ethyl

so..

4-ethyl-3-methyl-hexyne

Q3.

terminal alkyne means an alkyne bonded in the FIRST carbon

so... due to naming rules, it MUST not include any specification

so..

a can't be, since it has 2- stated as specification

b could not be, since this is alkene

c) this is a good answer, since it has 1- and the "yne" group

d) this can't be, since it stte is in the 2nd carbon, therefore not terminal

Q4.

alkyne + acid --> alcohol, + water --> ketone ALWAYS

so don't choose any alcohol solution, the only optino is then c

Q5.

this is simply --> 2H+ attachment and 2 Br attachment

so

CH3CH2BrBrCH2CH3

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