Question 23 What is the product, W, of the following reaction sequence? i. NaOEt niin ii. NaOtButyliv. NaOH v.H30* heat (-CO) W 1 equiv. 11.Br 1 equiv. HOC -COH HOC EtO2- o COH -CO EL Ι II III i COH IV V A. III B. C.IN D. V E. IV Question 24 Which one of the following best represents the predicted approximate chemical shift and coupling for the hydrogen(s) indicated with the arrow? A. 2.40 ppm, quartet B. 2.40 ppm,...
Predict the product for the following reaction. OH 0 do000 II III IV Select one: a. I b. II O c. III od. IV O e. V
Question 1 Which of the following hydrogens is the most acidic? II IV I III A. IV B. V C. III D.I E. II Question 2 What is the product, Z, of the following reaction sequence? iz H30+ T-H20)* ia. CI H307 + Z مل I II III IV A. IV B. II C. III D.V E.
II: ketone III: carboxylic acid IV: 2° alcohol V: cyclic ester II: carboxylate III: aldehyde IV: epoxide V: ketone II: ketone III: carboxylic acid IV: 3° alcohol V: cyclic ester II: ether III: ketone IV: 3° alcohol V. ketone II: ketone III: carboxylic acid IV: Valcohol V/ cyclic ester 2. Choose the more stable of each of the three pairs of structures drawn below. a H 5 4. 1. 3. [c]1,3&5 6. [e] 1,4&5 [a] 1,4&6 [b] 2,4&6 [d] 2,3&5
What is the major product obtained from the following reaction sequence? Br2 EtONa NACN D HBr B A ETOH hv peroxides heat CN CN CN CN II III O A. III OB. IV O C.V OD II O E. I What would be the major product of the following reaction sequence? 1. HBr, ROOR, hv 2. CH CO-H, CH coNa OH 0.CCH 0.cCH Ph Ph I III IV O A.I O B. II O C. IV O D. II O...
Which of these molecules are structural isomers of n-octane (CgH18)? III II IV Select one: a. I, II, IlII, IV, and V b. III and IV c. II and V d. I, IIl, and IV e. only II has 8 carbon atoms in a chain
(b) Determine if the lower bound theorem identifies -2 as a lower bound for the real zeros of f(x). 56)=x +17x² +11x+23 Part: 0/2 Part 1 of 2 (a) The upper bound theorem (Choose one) 3 as an upper bound for the real zeros of (x). X
4. Sketch an appropriate wavefunction in the four regions (I, II, III, IV) shown below (see figure in next page) when E< Vo. Write a valid general solution for each. State the boundary conditions required to completely solve this problem (do not solve it!). 0 a b Zones I II III IV
19. Which of the following molecules are achiral? A) II, III B) I, II C) I, IV D) III, IV 20. How many stereogenic centers are present in ephedrine, a bronchodilator and decongestant? ephedrine A) 0 B) 1 C) 2 D) 3 21. Rank the following groups in order of decreasing priority according to the Cahn-Ingold- Prelog system. -NH2 -NHCH3 -CH2NH2 CH2NHCH3 п V . A) B) I>II> III > IV II >I>IV > III II C II >I> III...
5. Select methods to prepare n-butylamine without complications? I. NH, - [NH,Br] 1. KOH 2. butylbromide 3.Hydrazine 1. NaN3 2. LAH 3.H20 BH(CN) 1.03 2. DMS A. I, III and IV B. II, III and IV C. I and IV D. II, IV and V E. III, IV and V 6. Select the two products expected from the reaction shown. HO A. I and VI B. III and V C. II and I D. IV and V E. Illand VI...