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25. Which compound has exactly 3 stereocenters? H H Н. H H ін H H IH...
Question 20. Which is the shortest bond in the following compound? H н-С—С—С—С- С—н LA HH H I III IV | A. В. C. D. IV I and IIl have the same length E.
Given the formula representing a compound: О-І НЕС-Н Н Н 1 H-с-с-с-Н | | ннн Which formula represents an isomer of this compound? Hн ТІ H-C=C-C-C-H 3. 1. н н ннн | | | | C=C-C-C-H 11 Hн нннн IT IT H-с-с-с-с-Н | | | | нннн Hн Hнн 2 . н-с-с-с-н 4. Н H-C-H -О-І
QUESTION 23 Which Newman projection has the greatest stability? H H Н. H CI Н III IV 11 IV QUESTION 24 QUESTION 24 What is the functional group that remains when the following compound is heated and gas is evolved? он a carboxylic acid an aldehyde an alcohol a ketone QUESTION 25 Which of the following will not react with chromic acid? methanol ethanol isopropanol tert-butanol
hybridization of SeCl4
Н Н Н 2 H- Я н н. Question Which compound below is nonpolar? O CF2C12 CFC13 O CF3C1 0 CHFC12 O CF4
Compound Structure н ннн ТТІ H-C-C-C-C-H ТІТІ н ннн 2 H-CEC — — Н H 3 Н H 1 4 Hн Н H H ТІТІ нс-с-с-с-с-сесс-Н н ннн H н нннннннн ТТІ ТІГІ н-с-с-с -С-С -C-CH ТТТТТТТТІ й нннннннн S Table 4. Hydrocarbon Structures 2 Record the name of the compound structure in Data Table 1
20) Which compound would be most acidic? a) HO b) ОН OH e) н H
Which hydrogen matches to which nmr signal?
Ha: 1H, ddd 2.95 ppm Hb: 1 H, d 2.86ppm Hc: 1H, m 2.50-2.44ppm Hd: IH, dt 2.38ppm He: IH, d 2.31ppm Hf 1H, ddd 2.24ppm Hg: 1H, d 2.16ppm Hh: 3H, m 2.05-1.82ppm Hi: 3H, s 1.63ppm Hj: İHan 1.61-1.53ppm Hk: 3H,s 1.59ppm CH 3 CH3
Ha: 1H, ddd 2.95 ppm Hb: 1 H, d 2.86ppm Hc: 1H, m 2.50-2.44ppm Hd: IH, dt 2.38ppm He: IH, d 2.31ppm Hf 1H, ddd 2.24ppm...
3) Which of the following compounds is chiral? A) H Н-С-н н B) H HO C-OH Н C) CH3 HO-C-H Cl D) Br Н-С-ОН н E) C Br- C-C Br 4) In the L- isomer of a Fischer projection of a monosaccharide, the -OH group furthest from the carbonyl is written A) on the left of the top chiral carbon B) on the right of the top chiral carbon C) on the left of the middle chiral carbon D) on...
Consideran i mechanism for the reaction of bromocyclopentane with hydroxide as shown below. Which elementary step or sequence of steps from the list below would outline the step(s) for an El mechanism? Н. HH E1 + OH Η. Η Η H H (1) + B HHH Η. Η -Н (2) ПВ + Br H. H H HO: (3) (В HOB Η. Η H HO Н. н H HO (3) . iB + H,0 + Br н Н H НО (4)...
Chemistry help please 3 easy
questions
3. Which are the correct configurations of the two chirality centers (stereocenters) in the following Fischer projection? CHO H HO ОН H CH2OH A. 2R, 3R B. 2R, 3S C. 2S, 3R D. 2S, 3S 4. When a sugar was treated with warm nitric acid it gave an optically active compound. Wohl degradation of the same sugar gave L-glyceraldehyde. The structure of the sugar is CHO -ОН H HO H CHO HO -H HO...