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- pa SHS Part 3: For each of the following representations of butane, determine what strain energy is involved in each Newman projection (torsional and/or steric) to explain why the first Newman projection is more stable than the second. (-Cl is smaller than any alkyl group) C. a. b. H. H II H. H CH3 H CH3 CH3 CH3 CH3 H H CH3 H H H CH3 Н HD CH 3 HY H H Steric CH3 TH H₂ -CH3 H Torsional CH3 CH3 4? Torsional H. y- CH3 HS AS AS is too close to CH3 H back is covered is by front # om-lo brod -SO H back is covered by frontWhich of the following conformation is the least stable conformation Newman projection)? CH3 CH3 CH3 CH3 CH;. H CH CH3 H. H H H H H. CH3 CH3 II III I A. I only В. П only C. III only D. both I and II3. a. E,R ✓ is? b. E.S C. S,Z 4. What is the л-energy diagram of the compound in question 3? d. R,Z e. not a.-d. a. b. C. d. e. not a.-d.
- Determine the name of the compound based on the Newman projections shown below. CH2CH3 CH2CH3 H. H H. H H. H. H H CH;CH3 H. CH3 II CH3 II ČH3 H. H. H. H. H3CH2C. H3CH2C H. ČH;CH3 CH3 VI ČH3 V ČH3 IVWhat Newman projection matches the given compound? CI H3C CH(CH3)2 CI CI H. (а) CH(CH3)2 (b) CH(CH3)2 H3C H. H3C H. CI H CI (с) H. CH3 (d) (H3C),HC H. H3C CH(CH3)2 H H.Which of the following is a wedge and dash structure for the following Newman projection? H Et H Et A. B. D.
- 2. Draw the Newman projection of the following compounds about the indicated bonds: 습니 1.H HO F., CH3 H H F CH3 H CH3 OH 1.HA. Circle the following molecules that have the S configuration. CH,CH3 CH,CH3 H. H3C-- H. CH=CH2 CH(CH3)2 CH3 CH3CH, CH2 HO, 3 1Consider 1– Bromo – 2– methylbutane. A. Looking down at the C1:C2 bond draw the Newman projection with the lowest energy B. looking down at the C1:C2 bond draw the Newman projection highest energy
- Which is the correct newman projection for the following molecule (as drawn below assuming no rotation) when looking down the bond indicated by the arrow? 0 0 Me Me Et Me Me Et Me Me II….. H H H HWhat are the bond-line formulas for the following compounds? a. 6-butyl-4,7-diethylundecaneb. 1-bromo-3-ethyl-5-methylcyclohexanec. trans-1,3-dimethylcyclopentane d. 1-bromopropane (the most stable Newman projection)e. trans-1,2-dibromocyclohexane (the most stable chair conformation)Draw the most and least stable Newman projections for the following molecules ( focus on C2 and C3). a. 2-chloro-2- fluoropentane b. 2,2-dimethylbutane C. 2-chloro-2-methylpentane d. 1,2-dibromoethane