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Magazine Chapter 7: Q46P (page 315)
How can the following compounds be prepared using ethyne as the starting material?
Short Answer
Step by step solution
Step1: Preparing compounds by using ethyne for part (a)
Acetal dehyde can be prepared using ethyne as the starting material and by using H2O, H2SO4, HgSO4 as reagents.
Step 2: Preparing compounds by using ethyne for part (b)
Propan-2-one can be prepared using ethyne as the starting material and by using NaNH2, CH3CH2Br and H2/Lindlar catalyst as reagents.
Step 3:Preparing compounds by using ethyne for part (c)
1,2-dibromobutane can be prepared using ethyne as the starting material and by using NaNH2, CH3Br and H2O, H2SO4, HgSO4 as reagents.
Step 4: Preparing compounds by using ethyne for part (d)
(E) Pent -2-ene can be prepared using ethyne as the starting material and by using NaNH2, CH3Br and Na, NH3 (liq) as reagents
Step 5: Preparing compounds by using ethyne for part (e)
(Z) Pent-2-ene can be prepared using ethyne as the starting material and by using NaNH2, CH3Br and NaNH2, CH3CH2Br as reagents.
Step 6: Preparing compounds by using ethyne for part (f)
Pentane can be prepared using ethyne as the starting material and by using NaNH2, CH3Br and excess H2, Pd/C as reagents.
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