3. Provide mechanisms for the following reactions. OH a. 18ОН b. C. HO H₂¹80 cat. H H₂O cat. H* -C=N: 180 EtOH + CH3CH₂CH₂CO₂H cat. CH₂SO3H O NH

3A Complete the reactions below. H₂SO4/H₂O HgSO4 A NaBH4 EtOH B лH₂SO4 C

1 Mol of benzene-1,2-dicarboxylic acid reacts with 2 mols of thionyl chloride. Which product is formed? он Socl, HO HO, HO .CI HO II IV %3D

What is the major organic product obtained from the following sequence of reactions? OC O OO P O B HOCH₂CH₂OH 1. Mg. Et₂0 H₂SO4 2. PhCHO Ph Ph 3 OH OH HCL H₂O W H Bri Ph

Fill in the lettered reagents (A-G) in the following reaction scheme. CHO HO COOH C. HO C CH (1) A (2) H,0 HO TBDMSO TBDMSO HO HO, HO. (1] F G (2) H,O

Elimination reactions were carried out using two different bases. Which will be the major products of Reactions 1 and 2 Reaction 1 Br NaOCH,CH3 CH, CH,OH (A) (B) Reaction 2 Br Na o HO (C) (D) Reaction 1, product A. Reaction 2, product D Reaction 1, product D. Reaction 2, product A Reaction 1, product C. Reaction 2, product B OReaction 1, product C. Reaction 2, product A

Provide a step-by-step mechanism for the reaction.

A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 340 mL of solution. What is the concetration (molarity) of the solution?

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Hg(OAc)2/H2O 3. What is the major organic product from the following reaction? 2) + NABH4 A В HO. ОН OH