Question

In E-Z notational system, which of the
following group will gets the higher
priority among the given?
(A) -CH2OH
(B) -C(CH3)3
(C) -CHO
(D) -C2H5​

Answer 1

In E-Z notational system, -CHO will get the higher priority. So the correct answer is option(c).

• Higher priority is given to the compound in which the atom directly attached to the carbon atom has a higher atomic number.
• In case the atoms have the same atomic number, atomic mass is considered. (Atomic mass of O>C)
• Multiple bonds should be treated like separate single bonds. (CHO has a double bond)

Answer 2

Explanation:

Among the various options given in question statement the correct option is option C.

E-Z notational system is used for the chemical structural bonding of isomers.

When considering E notation, isomers higher priority groups are kept on same side and in horizontal alignment while in Z notation, the isomers with higher priority are kept on opposite sides and it follows vertical alignment