CHEM2323 Problem 2-30 PS CH02 Name: Which of the following molecules has a dipole moment? Indicate the expected direction of each. (a) (b) OH (c) OH HO OH (d) .OH Problem 2-35 F.C= V.E-Lines-DOTS Calculate the formal charges on the lighter-colored atoms (shown in red in the text). (a) (b) (c) (CH3)20BF3 0-6-3-25+1 B=3-4= (d) :0=0. 06-2-4=0 H2C-N=N: 0-4-3-2- N=5-4= N=5-3-2=0 (e) CH3 CH3 CH3 (f) HO H₂C==j: C=4-4=0 N=5-4=1 N=5-2-4=-1 OH 0 = 6-3-2=+1 0=6-1-6=-1 Problem 2-40 C=4-3-2= P=5-4=1 N=5-4=1 :0: 0=6-1-6 Alcohols can act either as weak acids or as weak bases, just as water can. Show the reaction of methanol, CH3OH, with a strong acid such as HCI and with a strong base such as Na+ -NH2 3 <316 > CHEM2323 Problem 2-26 Tt O PS CH02 Name: Use the curved-arrow formalism to show how the electrons flow in the resonance form on the left to give the one on the right. (Draw all lone pairs first) (a) NH2 NH2 + (b) Problem 2-27 Double bonds can also act like Lewis bases, sharing their electrons with Lewis acids. Use curved arrows to show how each of the following double bonds will react with H-Cl and draw the resulting carbocation. (a) H2C=CH2 (b) (c) Problem 2-28 Identify the most electronegative element in each of the following molecules: (a) CH2FCI F Problem 2-29 (b) FCH2CH2CH2Br (c) HOCH2CH2NH2 (d) CH3OCH2Li F 0 0 Use the electronegativity table in Figure 2.3 to predict which bond in the following pairs is more polar and indicate the direction of bond polarity for each compound. (a) H3C-Cl or Cl-CI (b) H3C-H or H-CI (c) HO-CH3 or (CH3)3Si-CH3 (d) H3C-Li or Li-OH
CHEM2323 Problem 2-30 PS CH02 Name: Which of the following molecules has a dipole moment? Indicate the expected direction of each. (a) (b) OH (c) OH HO OH (d) .OH Problem 2-35 F.C= V.E-Lines-DOTS Calculate the formal charges on the lighter-colored atoms (shown in red in the text). (a) (b) (c) (CH3)20BF3 0-6-3-25+1 B=3-4= (d) :0=0. 06-2-4=0 H2C-N=N: 0-4-3-2- N=5-4= N=5-3-2=0 (e) CH3 CH3 CH3 (f) HO H₂C==j: C=4-4=0 N=5-4=1 N=5-2-4=-1 OH 0 = 6-3-2=+1 0=6-1-6=-1 Problem 2-40 C=4-3-2= P=5-4=1 N=5-4=1 :0: 0=6-1-6 Alcohols can act either as weak acids or as weak bases, just as water can. Show the reaction of methanol, CH3OH, with a strong acid such as HCI and with a strong base such as Na+ -NH2 3 <316 > CHEM2323 Problem 2-26 Tt O PS CH02 Name: Use the curved-arrow formalism to show how the electrons flow in the resonance form on the left to give the one on the right. (Draw all lone pairs first) (a) NH2 NH2 + (b) Problem 2-27 Double bonds can also act like Lewis bases, sharing their electrons with Lewis acids. Use curved arrows to show how each of the following double bonds will react with H-Cl and draw the resulting carbocation. (a) H2C=CH2 (b) (c) Problem 2-28 Identify the most electronegative element in each of the following molecules: (a) CH2FCI F Problem 2-29 (b) FCH2CH2CH2Br (c) HOCH2CH2NH2 (d) CH3OCH2Li F 0 0 Use the electronegativity table in Figure 2.3 to predict which bond in the following pairs is more polar and indicate the direction of bond polarity for each compound. (a) H3C-Cl or Cl-CI (b) H3C-H or H-CI (c) HO-CH3 or (CH3)3Si-CH3 (d) H3C-Li or Li-OH
Chapter2: Polar Covalent Bonds; Acids And Bases
Section2.SE: Something Extra
Problem 24MP: Predict the product(s) of the acid/base reactions below. Draw curved arrows to show the formation...
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Question
Transcribed Image Text:CHEM2323
Problem 2-30
PS CH02
Name:
Which of the following molecules has a dipole moment? Indicate the expected direction of each.
(a)
(b)
OH
(c)
OH
HO
OH
(d)
.OH
Problem 2-35 F.C= V.E-Lines-DOTS
Calculate the formal charges on the lighter-colored atoms (shown in red in the text).
(a)
(b)
(c)
(CH3)20BF3
0-6-3-25+1
B=3-4=
(d)
:0=0.
06-2-4=0
H2C-N=N:
0-4-3-2-
N=5-4=
N=5-3-2=0
(e)
CH3
CH3
CH3
(f)
HO
H₂C==j:
C=4-4=0
N=5-4=1
N=5-2-4=-1
OH
0 = 6-3-2=+1
0=6-1-6=-1
Problem 2-40
C=4-3-2=
P=5-4=1
N=5-4=1
:0:
0=6-1-6
Alcohols can act either as weak acids or as weak bases, just as water can. Show the reaction of methanol,
CH3OH, with a strong acid such as HCI and with a strong base such as Na+ -NH2
3
<316 >
Transcribed Image Text:CHEM2323
Problem 2-26
Tt O
PS CH02
Name:
Use the curved-arrow formalism to show how the electrons flow in the resonance form on the left to give the
one on the right. (Draw all lone pairs first)
(a)
NH2
NH2
+
(b)
Problem 2-27
Double bonds can also act like Lewis bases, sharing their electrons with Lewis acids. Use curved arrows to
show how each of the following double bonds will react with H-Cl and draw the resulting carbocation.
(a)
H2C=CH2
(b)
(c)
Problem 2-28
Identify the most electronegative element in each of the following molecules:
(a) CH2FCI
F
Problem 2-29
(b) FCH2CH2CH2Br
(c) HOCH2CH2NH2
(d) CH3OCH2Li
F
0
0
Use the electronegativity table in Figure 2.3 to predict which bond in the following pairs is more polar and
indicate the direction of bond polarity for each compound.
(a) H3C-Cl or Cl-CI
(b) H3C-H or H-CI
(c) HO-CH3 or (CH3)3Si-CH3
(d) H3C-Li or Li-OH
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