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- Organic chemistry(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 CH3
- 5 How many asymmetric carbons in this compound H H H Br H H H H-C-C-C -C-Ć-C-Ċ -H H Č H H H CI H O3 O t mN4) 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)24. 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
- Which of the following structures has the R configuration? H он H,C, CI CH2CH3 CH2CH3 H3C H. H3CH,C HO II Multiple Choice Only I Only I Only I and II I, II, and IIWhich of the following is the most probable identity of the substituent QThe 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 H