Question

1A.The ___ conformer of an alkane chain and the ____ of cyclohexane are the most stable.

eclipsed/boat

eclipsed/chair

staggered/boat

staggered/chair

1B.All of the carbons in cyclohexane are on the same plane.

true

false

and the H's too

1C. The chair conformer of cyclohexane is ____ stable than the boat conformer because the axial H’s on C-1 and C-4 are _____ each other.

more/nearest

more/farthest

less/nearest

less/farthest

1D.Strain between the ______ H’s on C-1 and C-4 in cyclohexane is due to ____.

axial/inductive

axial/steric

equatorial/inductive

equatorial/steric

1E.See a pKa table. What is the weakest base that reacts with acetone?

CH3COO-

CH3O-

OH-

NH2-

HCC-

Answer 1

1A) staggered/chair

1B) false

1C ) more/farthest

1 D ) axial/steric

1 E) CH3COO-

explanation :

1 A ) chair form of cyclohexane is more stable then boat form and also in stagarred conformation groups are far away repulsions are minimise

1C ) chair form of cyclohexane is more stable then boat form and also in stagarred conformation groups are far away repulsions are minimise

1 D) axial hydrogens are more strain

1 E )

acidity order : CH3COOH > H2O > CH3OH > C2H2 > NH3

basicity of conjugate bases :

CH3COO- < OH- < CH3O- < CCH- < NH2-