aestion 33 CH After siting down the C(2)-C(3) bond in the Newman projection of butane, which...
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After siting down the C(2)-C(3) bond in the Newman projection of butane, which is the gauche c н;С H,C Н. н CH; н Н Н н Н H CH, н H Hн (c) н;С Н. н CH, Н. н Н H H H- н Н CH; (d) нс н нсH, a. a b.b с. с d.d е. е f. f
After siting down the C(2)-C(3) bond in the Newman projection of butane, which is the highest energy conformation? HC Н.С Н H н CH; н н Н- H CH; H Н Н (а) -т е н СН, H,C Н. н Н. H СН. CH H H н не н Н CH; (d) Hн (е)
After siting down the C(2)-C(3) bond in the Newman projection of butane, which is the anti conformation? HC Н;С СН. Н. CH н. Н н CH; H- н H н CH; н H (b) Hн HC н CH H H Н. H Н H H н CH; (d) Н;С Н H CHỦ (f) а.а Ob.b Ос. с Od. d O e.e f. f
After siting down the C(2)-C(3) bond in the Newman projection of butane, which is the anti conformation? нус H3C CH, Н. CH, н Н н Сн, H- H Н Сн; н Н (а) (b) H н Н (c) HC CH СН. H H H H H- H H H Н CH; Hс н Сн, a. a Obb Сс с Cd. d е. е f, f
3. (a) A bond-line (dash/wedge) structure for butane is shown below. Using the Newman projection templates provided, draw the overall lowest energy (most stable) and overall highest energy (least stable) conformation possible in Newman projection form sighting down the bond indicated. Provide a brie explanation to justify the conformer shown for cach case. (2pts each correct Newman, 2pts for valid explanation) sight down CG- bond Lowest Energy (most stable) Highest Energy (least stable) Explain: (b) For the bond-line structure below...
3. 1) Draw the Newman projection of the following compound, looking down the indicated bond. (2) Label this Newman projections as a staggered or eclijpsed conformation. (3) Rotate this Newman projection to draw the Newman projection of the most stable conformation of this compound. (3) Label this Newman projections as a staggered or eclipsed conformation. (4) Re-draw this most stable conformation in a wedge-dash form as the original compound below is shown). a. он в н b. Cl
3. 1)...
Which Newman projection represents the most stable conformation of (CH),CHCH(CH)2? CH3 CH3 СCH3 (B) (A) CH3 H CH3 "СHз CHз CH3 CH3 н CH3 (D) (C) H. tCH3 CH3 CH3 Н Н CH3 CH3
CH₃ 5. Consider the Newman projection shown below right, which depicts 2- methylbutane as viewed straight down the bond between C, and Cz. Which angle results in the lowest energy conformation? CH3, CH3 a) 0 b) 60 H c) 180 d) 240 н 6. Consider the molecule shown below right. The energy barrier associated with the rotation about the C-C bond shown is expected to be greatest when R = R a) CH3 b) (CH), c) CH3CH2 d) H 7....
18. How many rings does the following molecule have? AL B.2 0.3 0.4 E. None of the above 19. Which of the following would represent the lowest energy conformation of butane looking at the Newman projection down the C2-C3 bond? A. The (CH3,CH3) eclipsed conformation C. The gauche conformation B. The (H,CH) eclipsed conformation D. The anti-conformation E. The parallel conformation
3. (6 points) For each compound below, draw a Newman projection of the lowest energy conformation. Sight down the indicated bond. The front carbon has been drawn for you. Be careful to preserve stereochemistiy. H. I- - - - - - - Hinn H2C CH(CH3)2 H2CH3 CH2CH2CH3