Answer to Question #230604 in Organic Chemistry for Kay

Question

Which of the following statements is INCORRECT?
(1) Acetylene is a stronger acid than ethylene since the conjugate base of acetylene is
more stable than the conjugate base of ethylene
(2) Terminal alkynes are strong acids since ionization gives an acetylide ion in which
the unshared electron pair occupied an orbital with 50% s-character.
(3) The acetylide ion is a carbanion, an anion in which the negative charge is borne by
the carbon atom
(4) The amide ion is a weaker base than the acetylide ion and cannot convert
acetylene to its conjugate base in quantitative yields

Answer 1

(2) Terminal alkynes are strong acids since ionization gives an acetylide ion in whicht the unshared electron pair occupied an orbital with 50% s-character.