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- Is the following compound R or S. Support your claim by indicating the priority ofthe groups attached to the asymmetric carbon. H,CCH, *CH,OCH, CIDraw the structure of each molecule. (a) (S)-1-chloro-2,2-dimethyl-1-phenylcyclopentane; (b) (1R,2S)-1-methyl-1,2-dinitrocyclopropane; (c) (R)-4-ethoxycyclohexene; (d) (3S,4S)-3-chloro-4-fluoro-2-methylhepta-1,6-dieneClassify the following structures as E/Z structures
- (5) Br CH H20 CH;CH;CH; ( ) ČH,CH3 Br CH;C=CNa ( ).Fill in the blanks: cis-1,3-Dimethylcyclohexane has two different chair conformations: one withboth methyl groups in __________ positions and one with both methyl groups in ____________ positions.Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
- Name the following branched alkanes: H3C- CH-CH3 CH3 H3C- CH-CH3 CH2-CH3 H3C CH2 CH2-CH-CH2-CH2-CH3 CH2-CH3 CH2-CH3 H3C CH2 CH2-CH- CH- CH2-CH3 CH3 CH2 CH2-CH3 H3C-CH2 CH-CH2 CH-CH2-CH2-CH3 CH3 CH3 H3C CH21 C -CH2-CH-CH2-CH3 CH3 CH3 CH3 H3C CH21 C -CH3 CH3 CH3 CH3 C CH3 CH3 CH2 CH3 H3C CH2 C- CH2-CH3 CH2-CH3 H3C CH2 CH2-CH2-CH2 H3C CH2 CH2-CH2-C-CH2-CH3 CH33. For each of the following pairs of structures, indicate whether the structures are (a) constitutional isomers, (b) stereoisomers, or (c) the same compound (a) CH3CH2CH(CH3)2 and (CH3)3CCH3 Constitutional isomers (b) O (d) (e) (f) H3C. H3C CH₂CH3 H H H CH₂ and and and and and H H CH3 H CH3 CH₂CH3 H Y |||| Same compound =CH₂ Constitutional isomer Stereoisomers. Stereoisomers same compound(II)
- (B) Draw two chair conformations of the following substituted cyclohexane and identify the most stable conformation. Clearly show the axial and equatorial bonds.Give typed explanationDraw the structures for these molecules. (a) 2-chloropropene; (b) 3-methylbut-1-ene; (c) 2,3-dimethyl-2-butene;(d) 2-ethoxy-3,3-dimethylcyclohexene; (e) 3,4,5-trimethoxycycloheptene; (f) 3-bromo-2-methyl-4-nitrocyclopentene;(g) 3,3-dibromo-4-methylcyclopentene; (h) 4-methyl-2-pentyne

