Some Basic Principles Of Organic Chemistry Question 206
Question: Which of the following species is paramagnetic in nature [NCERT 1984]
Options:
A) Free radical
B) Carbonium ion
C) Carbanion
D) All the above
Show Answer
Answer:
Correct Answer: C
Solution:
Without intermediate reaction take place as under $ CH_3-CH=CH_2+HBr\to CH_3-\overset{Br,}{\mathop{\overset{|}{\mathop{C}},H}},-CH_3 $ (According to markownikoff rule) But the halogen bonded with terminal carbon so it take place in presence of peroxide by free radical mechanism.
$ \underset{peroxide}{\mathop{R-O-OR}},\to 2R\overset{.}{\mathop{O}}, $ ; $ HBr+\overset{.}{\mathop{RO}},\to ROH+B{r^{.}} $
$ CH_3-CH=CH_2+B{r^{.}}\to CH_3-C\overset{.}{\mathop{H}},-CH_2-Br $
$ CH_3-\overset{.}{\mathop{C}},H-CH_2Br+HBr\to $
$ CH_3-CH_2-CH_2Br+B{r^{.}} $
