2 chloro 3 methylbutane is treated with sodium in etgeral solution
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You could solve this problem by writing the equation for each reactant, and seeing which one gives the desired product.
It is often easier to do a retrosynthesis.
That is, we work backwards from the products to figure out what the starting materials must be.
The Wurtz synthesis is
R-X + 2Na
→
R-R + 2NaX
So, we could write
R-R
⇒
R-X + X-R
(⇒ means "implies" or "can be made from").
For your problem, we could write
CH
3
CH
2
CH(CH
3
)-CH(CH
3
)CH
2
CH
3
⇒
CH
3
CH
2
CH(CH
3
)-X
+
X-CH(CH
3
)CH
2
CH
3
If you look at the list of starting materials, yours must be
CH
3
CH
2
CH(CH
3
)-Cl
, 2-chlorobutane.
The equation for the reaction is then
CH
3
CH
2
CH(CH
3
)-Br
+
2Na
+
Br-CH(CH
3
)CH
2
CH
3
→
CH
3
CH
2
CH(CH
3
)
-CH(CH
3
)CH
2
CH
3
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