Cis-2-pentene undergoes a halogenation reaction in the presence of diatomic bromine. What is the product of this reaction?
A.) cis-2,3-dibromopentene
B.) 2,3-dibromopentane
C.) cis-2,2-dibromopentane
D.) 2,2-dibromopentane
Cis-2-pentene undergoes a halogenation reaction in the presence of diatomic bromine. What is the product of...
Both the E and Z diastereomers of 2-pentene can react with bromine to from 2,3-dibromopentane. (E) Br2 arty 4 stereoisomers a. Draw the 4 possible stereoisomers of 2,3-dibromopentane. b. Using a mechanism, prove that E-2-pentene can only form the 2S, 3R and 2R, 3S stereoisomers. c. Using a mechanism, prove that Z-2-pentene can only form the 2S,3S and 2R, 3R stereoisomers.
4) Which of the halogens below undergoes radical halogenation with ethane most rapidly? A) bromine B) pyridine C) iodine D) fluorine E) chlorine
The reaction of 2-pentyne with Na/NH3 gives the following product: (1) cis-2-pentene (2) trans-2-pentene (3) 1-pentyne (4) pentane
When cyclopentone was treated with bromine in methanol as solvent, dibromide U and 00-halogenation product V were observed. 62 MeOH ‘OME 7 (a) Explain briefly the formation of anti-dibromide U instead of syn-dibromide in this reaction with the aid of reaction mechanism. (2 marks) (b) Account for the formation of co-halogantion product V in this reaction. (2 marks) (c) Suggest a modification to the reaction condition such that ONLY dibromide U would be formed. (1 marks) (d) Suggest a modification...
11. What is the kinetic product obtained from the addition of 1 mole of bromine to 1,3- pentadiene? a. (E)-4,5-dibromo-2-pentene b. (E)-1.4-dibromo-2-pentene c. (E)-2,3-dibromo-4-pentene d. (E)-1.2-dibromo-4-pentene e. none of a-d 12. Which of the following is aromatic 13. How many are non-aromatic among the examples of Question 12? a. O b. 1 c. 2 d. 3 e. 4
b. Assume that you carried out separate reactions of bromine with (E)-2-pentene and (Z)-2- pentene. After isolating, purifying and determining the melting point of the product from each reaction, you found that the melting points were significantly different. Explain why.
QUESTION 1 The reaction of butanoic acid with bromine in the presence of phosphorus tribromide followed by addition of water yields which product? 2,3-dibromobutanoic acid 3-chlorobutanoic acid C2-bromobutanoic acid C 2-chlorobutanoic acid QUESTION 2 What is the relationship between keto and enol tautomers? Cresonance forms stereoisomers constitutional isomers different conformations of the same compound QUESTION 3 The reaction of cyclohexanone with LDA followed by allylbromide gives which product? C2-allylcyclohexanone C1-allylcyclohexanol C3-allylcyclohexanone C2-lithium diisopropylamidecyclohexanone
What will be the product for bromination of the following compound? H₃C -СН3 O 3-bromopentane O 2,3-dibromopentane 2,2-dibromopentane 1,2-dibromopentane
Please give a detail mechanism of 22-29 22. What is the major organic product obtained from the following reaction? 1. NalH 2 CHỊCH CHỊCH EM a. l-methyl-4-nonyne b. 2-methyl-4-nonyne c. 2-methyl-3-nonyne d. 3-methyl-4-nonyne ANSWER: d 23. What is the major organic product obtained from the following reaction? Br. CH, C=C=CH CH, CH,COOH, LIBE - a. (E) 1.2-dibromobutene b. (Z) 1,2-dibromobutene c. (E) 2,3-dibromobutene d. (Z) 2,3-dibromobutene ANSWER: C 25. What is the major organic product obtained from the following reaction?...
How many distinct eight-carbon hydrocarbon products would be formed in the complete hydrogenation of a mixture of 1-octyne, 2-octyne, and 3-octyne, in the presence of a palladium catalyst? نیا دن ف 00 Ow Ans. 8. Identify the expected major product from the treatment of 1-pentyne with 2 equivalents of HBr. B. 1-bromo-1-pentene 2-bromo-1-pentene 1,1-dibromopentane 2,2-dibromopentane 1,2-dibromopentane D. E.