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How do you convert 1-butene to 2-bromobutane and 1,2-dibromobutane?
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- Pyrethrins, such as jasmolin II (shown below), are a group of natural compounds that are synthesized by flowers of the genus Chrysanthemum (known as pyrethrum flowers) to act as insecticides. CH3 CH2=CH-CH. CH-C- -HCS 0-CH, CH,-C H2C- ČH, Which is not a functional group or structural feature in jasmolin II? cycloalkane carboxylic acid ester alkeneDraw the following compounds. a) 4-methyl-1,2-pentadiene b) (3E, 5Z)-2,6-dimethyl-1,3,5,7-octatetraenea) Give the molecular formula and draw the skeletal structure for 3-bromo-3- methylhexane. b) Name (including E/Z stereochemistry) the FIVE alkenes that can produce 3-bromo-3- methylhexane on reaction with HBr. Draw the skeletal structure of each molecule.??? c) Define the type of stereoisomerism present in 3-bromo-3-methylhexane. Name and draw the tetrahedral representation of the two stereoisomers?. d) For the base-catalysed hydrolysis of 3-bromo-3-methylhexane (i.e. reaction with the nucleophile OH-): i) ii) iii) iv) State whether the reaction is likely to proceed by an SN1 or SN2 mechanism, and explain your choice Give the likely rate law for the reaction. Explain your choice. For the reaction intermediate, draw its structure and give the VSEPR description of the geometry at the reaction centre Give the names and draw the structures of the two reaction products. Explain your conclusions
- 2. Draw structures for the following molecules. 2,7-dibromo-5-isopropylocta-2,5-diene a) b) 4-t-butylhept-6-en-1-yne c) 1,1-diethylcycloheptane1,4-Pentadiene (CH2=CH-CH2-CH=CH2) is a liquid at room temperature and has a density of 0.66 g/mL and molar mass of 68.12 g/mol. In a laboratory experiment, 3.80 mL of this compound was treated with 4.80 mL of conc. H2SO4 (100% w/w; molar mass 98.08 g/mol). Note that the density of conc. H2SO4 is 1.84 g/mL. The resulting sulfate ester was then treated with 1.20 mL of water (molar mass 18.02 g/mol) affording, after work- up, 2,4-pentanediol (molar mass 104.15 g/mol) as the crude product. The crude product was then purified by simple distillation, which yielded 2.00 g of pure product. What is the theoretical yield of 2,4-pentanediol expressed in grams? Show calculations. What is the percentage yield of pure 2,4-pentanediol?1,4-Pentadiene (CH2=CH-CH2-CH=CH2) is a liquid at room temperature and has a density of 0.66 g/mL and molar mass of 68.12 g/mol. In a laboratory experiment, 3.80 mL of this compound was treated with 4.80 mL of conc. H2SO4 (100% w/w; molar mass 98.08 g/mol). Note that the density of conc. H2SO4 is 1.84 g/mL. The resulting sulfate ester was then treated with 1.20 mL of water (molar mass 18.02 g/mol) affording, after work- up, 2,4-pentanediol (molar mass 104.15 g/mol) as the crude product. The crude product was then purified by simple distillation, which yielded 2.00 g of pure product. a. Provide a balanced chemical equation to show the reaction between 1,4-pentadiene and sulfuric acid. Do not use molecular formulas in the chemical equation except for sulfuric acid. b. What reactant is the limiting reagent in this chemical equation? Show calculations to support your answer.
- 6. What is the correct IUPAC name of the following compound? A) 1-bromo-3-chloro-5-isobutyl-4-methylbenzene B) 5-bromo-1-chloro-3-sec-propyl-2-methylbenzene C) 5-bromo-1-sec-butyl-3-chloro-2-methylbenzene Br D) 1-bromo-3-sec-butyl-5-chloro-4-methylbenzene E) 5-bromo-1-chloro-3-isobutyl-2-methylbenzeneCompounds with two carbonyl groups are named as alkane diones, for example: R 2,3-butanedione The compound above is an artificial flavor added to microwave popcorn and movie-theater popcorn to simulate the butter flavor. Interestingly, this very same compound is also known to contribute to body odor. Name the following compounds: cyclohexane-1,3-dione cycloheptane-1,4-dione gily nonane-2,8-dione1) Complete the table to show whether the alkenes exhibit E-Z isomerism. 2) Once finished, try and decide whether any E-Z isomers are E or Z isomers. E-Z Isomers? (/X) Name Structure Isomer 1 Isomer 2 methylpropene 1-chloropropene 2-ethylpent-1-ene 3-methylpent-2- ene 3,4-dimethyhex-3-ene 2-bromo-3 chlorobut-2-ene
- d) 2-isopropyl-1,1-di-n-butylcyclopentane11 T |8 Draw the condensed structural formulas of the following hydrocarbons: a) (Z) - 4 - ethyl- 5 - 2methyl - 2 - hexene. b) 3,3 - diethyl - 2 -methyl - 1 - heptene. c) (E) - 2 - hexene. d) (E) - 4 - methyl - 2 - pentene. e) 4,4 - diethyl - 2 - hexyne. f) 3,3 - dimethyl - 1 - butyne. carb mas pol a) 3.1) Complete the table to show whether the alkenes exhibit E-Z isomerism. 2) Once finished, try and decide whether any E-Z isomers are E or Z isomers. E-Z Isomers? (/X) Name Structure Isomer 1 Isomer 2 methylpropene 1-chloropropene 2-ethylpent-1-ene 3-methylpent-2- ene 3,4-dimethyhex-3-ene 2-bromo-3 chlorobut-2-ene Fatty acids (26.5- Q3) Guidance on writing Q3 Why monounsaturated fatty acids have have E/Z isomerism Example of E isomer and how to differentiate to Z Isomer Health issues associated with Z (trans) isomer