2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: ii) iii) iv) tolgoy Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.

2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: ii) iii) iv) tolgoy Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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G.240.
bobyrisbla • PRACTICE PROBLEM 8.23 Alkenes are more reactive than alkynes toward addition of electrophilic reagents (i.e., Br2, Cl2, or HCI). Yet when alkynes are treated with one molar equivalent of these same electrophilic reagents, it is easy to stop the addition at the "alkene stage." This be a paradox and yet it is not. Explain. appears to
Give explanation of the correct option and explanation of the incorrect options.
3c）Referring to the intermediates you drew in problem below explain in detail why no meta product is obtained in the Friedel-Crafts alkylation of chlorobenzene. Draw all pertinent resonance structures to support your argument.
Below is a schematic representation of possible reactions that Compound X can undergo. Use the scheme to answer the following questions. 1)What is the IUPAC name for Compound X? 2)What type of reaction (s) is/are represented by (i) and (ii)? 3)Compound X undergo transitions through either [A] or [B] to produce compounds [1], [2], [3] and [4]. Draw the structures of [A] and [B]. 3)illustrating with reaction mechanisms, show how compounds [1], [2], [3] and [4] are formed. 4)Which of the compounds in the following pairs will occur in relatively higher yields and why?I)[1] and [2] iI)[3] and [4]
Q3. Consider the following reaction. Give the structure of the most likely carbon-containing product and justify your answer with a detailed curved-arrow mechanism. NaOEI, HOE! H₂O
f) Alkene X can be decomposed with hydrogen peroxide catalyzed by sodium tungstate to substance Q. This can be further degraded by iodoform reaction to substance R. Give the structures of substances Q and R. Xx S Na₂WO4 H₂O2 Q (C9H1603) 1: NaOH, 1₂ 2: H+ P₂O5 teplo - CHI3 R (C8H1404) P₂O5 teplo T g) The preparation of substance Q from substance X using hydrogen peroxide is a redox reaction. Identify the reductant and oxidant in this reaction, write the formal oxidation number to the atoms where it changes during the reaction and calculate the reaction. h) Substances Q and R undergo a reaction with phosphorous oxide under heating to form various products T and S. Determine the structure of substances T and S if you know their H NMR : 1H NMR (S): 2.2 (t, 2H); 1.8 (t, 2H); 1.3 (s, 6H). 1H NMR (T): 4.6 (d, 1H); 4.3 (d, 1H); 2.2 (t, 2H); 1.5 (t, 2H); 1.3 (s, 6H).
VII. 1-bromo-3-methyl-2-butene undergoes nucleophilic substitution reaction in both ethanol and sodium ethoxide/DMSO mixture. (1) Please write all organic substitution products for each of the two reactions, if two products are formed in a reaction, assign the major product, assuming that the reaction is under kinetic control (2) What is the most likely mechanism for each reaction? (giving the name of mechanism is sufficient).
Q9:- Outline a possible laboratory, synthesis of each of the following compounds from benzene and/or toluene, using any needed aliphatic and inorganic reagents, (a) m-bromophenol (b) 5-bromo-2-methylphenol Q10:- Explain how Esters are more reactive than amides in nucleophilic acyl substitution reactions.
Hh.182.
Paragraph Styles Edi 7. Answer ALL parts of the question (a) Predict the organic products formed when 3-methoxybenzaldehyde is heated with formaldehyde in the presence of concentrated sodium hydroxide (after final acidification with HCI) (Scheme Q7a): 1. NaOH, heat MeO, H. H. 2. HCI Aromatic (Scheme Q7a) (b) Give the full name of this reaction. (c) (1) Identify the electrophile in the hydride transfer step to form the aromatic product. (ii) Draw a mechanism for the reduction of this electrophile.
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