Acetylene hydrocarbons are acidic because

Question

Acetylene hydrocarbons are acidic because (A) acetylene contains least number of hydrogen atoms (B) acetylene has only one hydrogen atom at each carbon atom (C) acetylene belongs to the class of alkynes with formula CnH2n-2  (D) sigma electron density of C-H bond in acetylene is nearer a carbon which has 50% s- character

Tardigrade Admin · Accepted Answer

In acetylene, carbon is in sp (50% 5, 50% p character) hybrid state. Due to very large s- character, the electrons in sp hybrid orbitals are held more tightly by the nucleus and consequently the electron pair of H-C= bond is displaced more towards the carbon atom and helps in release of H+ ion. Hence, terminal acetylene hydrocarbons are acidic in nature.

Q. Acetylene hydrocarbons are acidic because

acetylene contains least number of hydrogen atoms

acetylene has only one hydrogen atom at each carbon atom

acetylene belongs to the class of alkynes with formula $C_{n} H_{2 n - 2}$

sigma electron density of $C - H$ bond in acetylene is nearer a carbon which has 50% $s -$ character

Q. Acetylene hydrocarbons are acidic because

acetylene contains least number of hydrogen atoms

acetylene has only one hydrogen atom at each carbon atom

acetylene belongs to the class of alkynes with formula Cn​H2n−2​

sigma electron density of C−H bond in acetylene is nearer a carbon which has 50% s− character

acetylene belongs to the class of alkynes with formula $C_{n} H_{2 n - 2}$

sigma electron density of $C - H$ bond in acetylene is nearer a carbon which has 50% $s -$ character