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- What is the strongest nucleophile, NH3, CH4, CH3O-, or H2O?4. Which arrow identifies the nucleophilic site in the molecule shown? <40 a dThis reaction is an example of conjugate addition of a nucleophile to an a,ẞ-unsaturated carbonyl. O CH3CH2CH2CH=CHCSCOA H₂O OH CH3CH2CH2CHCH2CSCOA Draw the two resonance structures of the enolate anion intermediate for this reaction. • Draw an R1 group in place of COA. The R group tool is located in the charges and lone pairs drop-down menu. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate resonance structures using the symbol from the drop-down menu. ->> 90-87 O + ? ChemDoodle >
- 2. Draw the structures and explain why CH3CH₂O and CH3CO₂ are good nucleophiles but CH3SO3, water, and alcohols (R-OH) are poor nucleophiles. Propose a 'cutoff' for the amount of negative charge needed to be a good nucleophile. CH3CH₂O CH3CO₂ CH3SO3 H₂O CH₂OH4. Circle the molecule that would react fastest in an SN2 reaction. In addition, classify cach molecule as methyl, 1°, 2° or 3°. CI CISame reaction as in Q1. H3PO4 What type of carbon does the nucleophile attack? O methyl O primary O secondary O tertiary O quaternary
- True or false 1.an intermediate is produced in the SN2 reactiom is a carboncation. 2.In SN1 reactions nucleophile HI will react faster than HCL 3.Halogenated waste can be disposed off in a general waste solvent.What direction does the nucleophile approach the substrate in an SN2 reaction?2. Draw a mechanism for the reaction of the nucleophile and the electrophile as indicated below. Also draw the product produced. CH3 H3C+CI CH3 + HO