4. The following 2 isomers are reacted with HBr, first at low temperatures (<-20°C) and then...
(a) Answer TWO of (i), (ii) or (iii) [2 x 6 marks] (i) The two isomers shown below undergo E2 elimination at very different rates when reacted with KO'Bu. Me • Me Me Br Br (A) Draw structural representations of both isomers. (B) Indicate which isomer will react faster. (C) Give the structure of the product and provide a reaction mechanism for its formation.
Answer the following questions to complete your Results and Discussion section for this experiment. HBr HBr A B Br Br 1 2 2. Does a more negative heat of formation (a larger negative number) mean that a compound formation? Draw an energy diagram that illustrates this. more stable or less stable than an isomer with a less negative heat of Drawing this on paper and uploading an image is recommended 3. There is a third bromobutene structure that could have...
3&4 a Week+15+Workshop Questions.pdf (page 2 of 4) Highlight Rotate Markup hindered base NaN(SiMes). 3. "Cirele each compound that has a conjugated x system. 0 4. ."Draw the major product expected for each reaction, showing the mechanism for its formation. HBr 0°c HBr 40°C
E2 Reaction 2. Draw all constitutional isomers formed in each E2 reaction and predict the major product using the Zaitsev rule. Be OH El Reaction 3. What alkene is the major product formed from each alkyl halide in an El reaction? 4. Label the mechanism as SN2, SN1, E2 or El. You do not have to draw the product(s). CHO CH3-C-CH2-CH CH
Provide the major organic product of the reaction shown below. HBr (2 eq.) -C =C -H. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. 3 Co. . ®. H: 200 m O + 1'? Marvin JS ChemAxon
Problem #2. Alkene Spectroscopy a) Draw in two of the major fragmentation products of the radical cation of this alkene in the boxes provided. Clearly indicate if each compound is a radical, a cation, or a radical cation. -4 m/z 125 m/z = 97 b) Briefly describe the diagnostic peaks for the alkene from part a) in the IR spectrum. Explain where you would look (which cm) and what you would see. Since we are focusing on diagnostic peaks here,...
Please help me with the following questions: A) Draw all isomers of C4H9Br, name then and arrange them in order of decreasing reactivity in Sn1 reaction. B) Give the products (if any) of the E2 reaction of the following substrates: 1) CH3CH2I 2) CH3I 3) (CH3)3CCl 4) (CH3)3CCH2I C) Write all the products for the E1 reaction of 3-bromo-2,3-dimethylpentane with a base and heat. Indicate which product is the major one and why. Explain!
4. Draw the major organic product(s) for each of the following reactions. HBr, ROOR a. 1. 03 b. 2. H202 1. Os04 c. 2. H2S
4. Predict the products of the following reactions & indicate whether they are most likely to go through an SN2, SN1, E1, or E2 mechanism. NaCN DMSO NaOH CH3OH heat Only one product is formed in the following E2 elimination reaction. Draw an arrow-pushing mechanism for the reaction and provide the correct product structure. Include a 3-D drawing (chair conformation) displaying proper stereochemistry of the transition state to explain formation of only the major product. CH3 •Br NaOCH3 ~"'CHS
2) a- Provide the reagents (A, B and C) and the product D in the following multistep synthesis b- Write the name of product I. DII C) a-Draw the product for each step of the reaction. b-Name each reaction in the scheme. 3) 1) 3 eq. NaNH2 2) NH4CI Br NaH HBr, H202