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.
Knee numb: Introduction. Knee numb: Abnormal sensation of numbness felt at the knee. See detailed information below for a list of 6 causes of Knee numb, Symptom Checker, including diseases and drug side effect causes.Â» Review Causes of Knee numb: Causes | Symptom Checker Â».nee numb: Symptom Checker. Listed below are some combinations of symptoms associated with Knee numb, as listed in our database. Visit the Symptom Checker, to add and remove symptoms and research your condition.