st Question 1 0/2 pts Identify the electrophile and nucleophile in the Aldol condensation. (Check all that apply.) Nucle
Posted: Thu Dec 02, 2021 5:18 am
- St Question 1 0 2 Pts Identify The Electrophile And Nucleophile In The Aldol Condensation Check All That Apply Nucle 1 (36.35 KiB) Viewed 67 times
st Question 1 0/2 pts Identify the electrophile and nucleophile in the Aldol condensation. (Check all that apply.) Nucleophile: enolate of dibenzyl ketone u Nucleophile: enolate of benzil E Electrophile: benzil Electrophile: dibenzyl ketone Nucleophile: hydroxide ion
t Question 3 0/2 pts Why is a mixture of 95 % ethanol:toluene (1:1) used for the recrystallization of TPCP? (Check all that apply.) The mixture has a boiling point that is higher than for both individual solvents. TPCP dissolves poorly in 95 % ethanol at high and at low temperature. TPCP has a higher solubility in the mixture than in toluene at high temperatures. DTPCP dissolves well in toluene at high and at low temperature: TPCP dissolves well in the mixture at high temperature but poorly at low temperature.
Question 9 0.67 / 2 pts Why is 1,2-dimethoxyethane used as solvent in the Diels-Alder reaction? (Check all that apply) It causes the product to preciptate during the reaction. It has a higher boiling point than diethyl ether. It is a nonpolar solvent. It is completely miscible with water It is more polar and dissolves the anthranilic acid better.
E Question 10 0/2 pts How many signals do the 13C-NMR spectra of tetraphenylcyclopentadienone (TPCP) and tetraphenylnaphthalene (TPN) display in CDC13? TPCP: 10, TPN: 10 TPCP: 10, TPN: 13 TPCP: 11, TPN: 13 OTPCP: 8, TPN: 10 TPCP: 21, TPN: 23
Question 11 0.67 / 2 pts One point that is stressed in the procedure is that the Diels-Alder reaction has to be carried out in an open system. What are the gaseous byproducts of the reaction? (Check all that apply) nitrogen nitrogen dioxide water carbon monoxide carbon dioxide
Question 13 0/2 pts Which major product is formed in the Aldol condensation of benzaldehyde of acetaldehyde? cinnamaldehyde benzacetone © crotonaldehyde benzil benzoin
Question 14 0/2 pts What are the solids obtained in the Diels-Alder reaction? (Check all that apply) Biphenylene U Octaphenylanthracene 2,7-Dimethyloctane Tetraphenylnaphthalene Biphenyl