As we saw in chapter 10, the positions adjacent to C=C, the allylic position, often show enhanced reactivity compared to simple alkanes due to the proximity of the adjacent p system. Similarly, the positions adjacent to a benzene ring, known as the benzylic position also show enhanced reactivity compared to simple alkanes. Students often confuse the term benzyl with phenyl, for example compare the location of the bromine atoms in Bromobenzene and benzyl bromide: Highlight benzylic carbon atom.
A probable cause of numbness in the upper, outer thigh is meralgia paresthetica, a condition that occurs when the nerve that provides sensation to the thighâs surface is compressed, according to Mayo Clinic. It often occurs on one side of the body and worsens upon walking or standing. Continue Reading.
Chronic finger numbness generally indicates some level of damage to the nerves. Pinky and ring finger numbness on the back and palm side of the hand can be a sign of ulnar nerve compression in the arm. Numbness of the thumb, index, middle, and half of the ring finger may be caused by carpal tunnel syndrome. Because a numb finger or numbness in general may be a symptom of a disease, disorder or condition, you should talk with your medical professional about any unusual sensations that last more than a few minutes.