H3O+ HO Inspect the final product and select all the reasons why acid in water was chosen to effect the following transformation instead of the other reagents.

The synthesis above used bromoethane, but acetylene is the only allowed source of carbon atoms. Using the reagents given, identify a synthetic route for the production of bromoethane from acetylene. The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer.

Convert 2-pentanol into 2,3-dibromopentane. Draw structures of the starting material (2-pentanol) and final product (2,3-dibromopentane), and show the two reactions needed for this synthesis. Include the structure of the intermediate compound, and the reagents and conditions for each reaction. Then explain why 1,2-dibromopentane would not be a significant product of this synthesis.

Can you assist with the steps?

Choose 2 of the 3 compounds and provide a synthesis starting with benzene and any other carbon compound with four or less carbons.

The mechanism proceeds through a first cationic intermediate, intermediate 1. Nucleophilic attack leads to intermediate 2, which goes on to form the final product. In cases that involve negatively charged nucleophile, the attack of the nucleophile leads directly to the product. H. Br + CH3OH Br Intermediate 2 (product) Intermediate 1 In a similar fashion, draw intermediate 1 and intermediate 2 (final product) for the following reaction. OCH3 Cl2 MEOH ĆI racemic mixture Pay attention to the reactants, they may differ from the examples. In some reactions, one part of the molecule acts as the nucleophile. • You do not have to consider stereochemistry. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate intermediate 1 and intermediate 2 using the the dropdown menu. → symbol from

1a). Plan a synthesis of 3,4-dibromoaniline, starting from benzene. 4steps are required, lists reagents needed and draw in the intermediates.

Draw the products of the three step reaction sequence shown below. Ignore inorganic byproducts. If the reaction results in a mixture of ortho and para isomers, draw only the para-product.

In both examples below the reactants shown are combined to bring about a nucleophilic substitution (S1, Sy2) and'or elimination (EI, E2) reaction What is the major reaction that takes place in each case? CH, CH, CH,CH,CHCCH, H20 Br NaNg CH,OH CH,CH,CHCH,CH, SN2

Provide the major product for the reaction of the following starting material with excess HBr. If more than one product is formed, list the major product first. If no reaction, draw the starting material.