Organic Chemistry Ch.3

Question 1

All single bonds are ___ bonds

Answer 1

Sigma

Question 2

Double bonds are ___ bonds

Answer 2

one pi bond on top of a sigma bond

Question 3

Triple bonds are ___ bonds

Answer 3

two pie bond and sigma bond

Question 4

pi bonds are (weaker/stronger) than sigma bonds

Answer 4

weaker

Question 5

If pi bonds are weaker than sigma bonds, why are double and triple bonds stronger than single bonds?

Answer 5

Because the strength of bonds is additive

Question 6

Proteins have limited rotation because ____

Answer 6

resonance in amide linkages between amino acids

Question 7

Rank the orbitals in decreasing order of strength: (sigma, pi, double, triple) ___>____>____>____

Answer 7

Triple>double>sigma>pi

Question 8

Describe the geometry of sp3 hybridized orbitals

Answer 8

Tetrahedral

Question 9

How do you determine s character?

Answer 9

number of s’s divided by total number of s’s, p’s, etc. (i.e. sp3, 1 s, 3 p’s, 1 s/4 total = 25%)

Question 10

Alkenes have ____ hybridization

Answer 10

sp2

Question 11

The third p orbital in alkenes is ___ to participate in __ bonds

Answer 11

unhybridized; p

Question 12

Describe the geometry of sp2-hybridized orbitals

Answer 12

trigonal planar

Question 13

Alkynes have ___ hybridization

Answer 13

sp

Question 14

2 p orbitals in alkynes are ___ to participate in ___ bonds

Answer 14

unhybridized; pi

Question 15

Describe the geometry of sp orbitals

Answer 15

Linear