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- (a) Ph Br H HO CH3 713 A (b) HC- H HO H CH A Draw Newman projections looking down the indicated bond (right to left) representing the following compounds.3 Select the correct representations (using Newman projections) for the staggered rotational isomers ("rotamers") about C2-C3 in 2-methylbutane. H H3C H3C H H3C I I- H H H CH3 H CH3 CH34. Which Newman projection corresponds to point A on the graph of potential energy vs. rotation about the C₂-C3 bond? Potential Energy- (A) (C) 0 H CH3 Q. 'Н H H H₂ H 60 CH₁ H -CH3 H A CH3 120 180 Degrees of Rotation (B) (D) n 300 240 HH H H 360 CH3 CH3 CH3 HDCH3 H&H H
- • How do you differentiate the following pair of compounds by IR? H, H2 H H,c-Cc-CH, H2 1 H;C CH3 H2 H2 -CH3 H2 2 H,C H2 H2 H,c-Cc-CH, H2 H,c-CCECH H;C 4The first resonance structure of acetamide, CH3 CONH2, is shown. H :0: ☐ || H-C-C-N-H H H Determine the correct second resonance structure of acetamide. H :0: -1 +1 H-C-C-N-H H H H :0: -1 ☐ ☐ H-C=C-N-H H H H :0: H-C-N-C-H HH ●● -1 H:0: H H-C-C=N—H H HWhich of the following is the correct wedge and dash conformation for the following Newman projection? Et CH3 CH3 HEt H ΟΙ ○ II III IV Ov || III =
- 4) Assign R or S configuration to the following molecules: H Br CH2CH2CH2 CH3 CH3 -CH2CH3 NH2 H3C- H. H3C CH(CH3)2 H CH2CH3 CH2CH3 -CH3 HO. CH=CH2 H,C- CH3 CH3 CH, H CH(CH3)2Q9R-carvone is responsible for the characteristic minty odor and flavor of spearmint oil, and its structure is shown below: HI H-C₁-C₂ -H H H C-CH O sp² on C1 and sp² on C2 O sp3 on C1 and sp³ on C2 O sp² on C1 and sp³ on C2 O sp³ on C1 and sp² on C2 C3-C H CAICS C5 CH H H H C6-H Which two orbitals overlap to form the o-bond between C1 and C2?
