For each of the following reactions, using one or more "-R", you may abbreviate portions of the molecule that are not changed in the reaction. However, be careful to show correct regiochemistry. If there is no reaction write "NR". 25. Draw the product of the reaction with Br, HO

Consider this reaction: Br CH₂OH + Br-Br H₂CO The mechanism proceeds through a first cationic intermediate, intermediate 1. Nucleophilic attack leads to intermediate 2, which goes on to form final product. In cases that involve a negatively charged nucleophile, the attack of the nucleophile leads directly to the product. Year Hot Br + CH₂OH Br Intermediate 1 Intermediate 2 (product) In a similar fashion, draw intermediate 1 and intermediate 2 (final product) for the following reaction. Br H Br₂ + NaBr + H2O H H H NaOH . Pay attention to the reactants, they may differ from the examples. In some reactions, one part of the molecule acts as the nucleophile. Structures are provided for you to modify in the sketchers below. . • 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 symbol from the dropdown menu. Sn [F H On [F I Br -OH HH…

The overall reaction #5 is referencing is above (first image). I DO NOT need help with #4, just #5, but 5D has to do with 4. I'm looking for some help with my main part of my question, number 5 A-D, but part 5D also asks for enthalpy values (I guess calculated from my first image)? I think the reaction is second order, but I'm not sure - I think it's second order because of the units Lmol^-1s^-1? And I don't really understand how to sketch a reaction energy diagram...

6. Heterogeneous catalysts that perform hydrogenation reaction, such as in the lecture, as subject to "poisoning", which shuts down their catalytic ability. Compounds of sulfur often act as "poisons". Explain why, on a particulate level, these sulfur atoms could shut down catalytic ability on a metallic surface.