**Predicting Major Products in Alkyne Reactions with HX**In this exercise, we aim to predict the major products resulting from the addition of one equivalent of hydrogen halides (HX) to various alkynes. Here are the examples provided:(a) An alkyne featuring a phenyl group (Ph) and a terminal triple bond. The reaction with HBr is depicted, indicating the point of addition across the triple bond.(b) A linear alkyne with a terminal triple bond, subjected to reaction with HCl. The drawing shows how the rearrangement occurs after the addition of HCl across the triple bond.(c) A cyclic alkyne structure with a triple bond, reacting with HCl. This example depicts the transformation involving the addition of the halogen and hydrogen to the respective carbons involved in the original triple bond. For each reaction, typically, the halogen (X) adds to the more substituted carbon, following Markovnikov's rule, unless specific circumstances favor a different mechanism.

The question is based on organic reactions.We need to identify the product and explain its…

Answered: Predict the major products resulting…

Predict the major products resulting from the addition of one equivalent of HX to the following alkynes. (a) (b) (c) Ph H HBr HCI HCI

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter21: Benzene And The Concept Of Aromaticity

Section: Chapter Questions

Problem 21.44P

See similar textbooks

Similar questions

(a) Answer the following questions based on the reaction scheme below. Jawab soalan berikut berdasarkan rajah tindak balas di bawah. H,SO, 180°C R OH+ Δ U NH, (i) State reagent Q. Nyatakan reagen Q. (ii) Draw the structural formula for compounds R, T, U and W. Lukiskan formula struktur bagi sebatian R, T, U dan W. PCI,
b) Fill in the gaps by drawing the structures of the missing reagents, intermediates and/or products of the following electrophilic aromatic substitutions. Chemical formulas have been added for guidance. . Step 1 Step 2 CH3 HNO. 1. CH;NO2 C;H3N Pd/C NO2 3 1 2 4 CH3 Brz FeBr C3H;Bro 6 Using resonance structures, justify whether the acetyl group of compound 5 will direct the bromination reaction to the meta or ortho/para positions
(a) Tsomane and Nyiko were given a task of synthesising methylenecyclohexane 2. After a brief discussion with each other, Tsomane proposed Method A to synthesise 2 from cyclohexanone 1 while Nyiko proposed Method B that started from hydroxymethylcyclohexane 3. Each student believed that their proposed method is better than the other. (Scheme below) (1) Ph Ph 8*8 Ph THF A 1 Santande B H₂SO4 100 °C 3 OH Using curly arrows, provide full mechanistic details accounting how methylenecyclohexane 2 was synthesised according to both Methods A and B.
(a) (i) 3-Methyl-2-butanol will react with sulphuric acid to give two isomeric alkenes in 3:1 proportions.(i) Write down the structures for these alkenes and assign appropriate systematic names to them. (ii) Name the most abundant isomer. (iii) Write down detailed mechanism for the formation of a minor product.
I need the answer as soon as possible
Hw.198.
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu. ● AAVII -85 ? ChemDoodleⓇ Y [F
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu. ● VIL ? ChemDoodle Ⓡ Qt Sn [F
! ( please answer 4 (c) with detail explanation and mechanism plzzz ,
3-Chloro-2-methylpropene reacts with sodium methoxide in methanol to form 3-methoxy-2-methylpropene. For each of the following changes in the reaction conditions, state whether the reaction rate would increase, decrease, or remain the same. Explain your reasoning. In some cases the identity of the major organic product would be expected to change; in such cases, give the expected major product. (a) the same quantities of reagents are dissolved in half the volume of methanol (b) 3-bromo-2-methylpropene is used in place of 3-chloro-2-methylpropene (c) sodium methanethiolate (CH3SNa) is used in place of of sodium methoxide
CCH H20, H2SO4 H9SO4 CH3 Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Hjö: -CH3 -CH3 H3O*
Kindly answer this question i & ii