Which compound(s) contains a chirality center(s)? Identify the chirality center(s) Br а) СООН b) H С—Н NH2 CH3 c) d) e) CH;CH,ĊCH,Br CH;CH,CH,OH CH3CH=CH, CH3
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A: Number of chiral centres = 2 Plane of symmetry = Absent Number of stereoisomers = 2n = 22 = 4
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- Draw examples of the following: (a) A meso compound with the formula C8H18 (b) A meso compound with the formula C9H20 (c) A compound with two chirality centers, one R and the otherDraw compounds that fit the following descriptions: (a) A chiral alcohol with four carbons (b) A chiral carboxylic acid with the formula C5H10O2 (c) A compound with two chirality centers (d) A chiral aldehyde with the formula C3H5BrO1. What is the relationship between the following two compounds? a.stereoisomersb.identicalc.constitutional isomers 2. Assign the absolute configuration of the chirality center as R or S.
- Are the following molecules chiral? Draw the skeletal structures of each and label the chirality center(s) if present. 1) 2-chloro-4-ethylhepatane 2) cis-1,2-pentadiool (suffix -ol indicates an alcohol) 3) 3,3-dibromo-5-propyloctaneAssign R or S configuration to the chirality centers in the molecule below.A Fischer projection of a molecule with one chiral center represented by a dot is shown below. Determine the R- or S-designation of this chiral center. A) R B) S C) no chiral center
- 11. Identify the correct configurations (R or S) of the chirality centers indicated on the Fischer projection shown below.Salinosporamide A, isolated from a microbe called Salinispora tropica has shown promise as an inhibitor of cancer cell growth. Select the chiral centers in the following structure; the selected centers will appear highlighted green.Allenes are compounds with adjacent carbon-carbon double bonds. Many allenes are chiral, even though they don’t contain chirality centers. Mycomycin, for example, a naturally occurring antibiotic isolated from the bacterium Nocardia acidophilus, is chiral and has [α]D = -130. Explain why mycomycin is chiral.
- Draw and name the seven aldehydes and ketones with the formula C5H10O. Which are chiral?One of the following molecules (a)–(d) is d-erythrose 4-phosphate, an intermediate in the Calvin photosynthetic cycle by which plants incorporate CO2 into carbohydrates. If d-erythrose 4-phosphate has R stereochemistry at both chirality centers, which of the structures is it? Which of the remaining three structures is the enantiomer of d-erythrose 4-phosphate, and which are diastereomers?(i) What is meant by chirality of a compound? Give an example.(ii) Which one of the following compounds is more easily hydrolyzed by KOH and why?CH3CHClCH2CH3 or CH3CH2CH2Cl
