Which of these molecules are structural isomers of n-octane (CgH18)? III II IV Select one: a....
Which of the following molecules/ions is/are likely to be planar? I. PCl3 II. BF4- III. XeF4 IV. BrF3 V. BrF5 VI. H3O+ A) I and IV B) II and III C) II and VI only D) III and IV E) IV and V
Which compound below is capable of possessing geometric isomers? i. ii. iii. iv. i & iii i & iv iv only ii only None of these
MULTIPLE CHOICE (4 points each) Chow - III IV Use the Fischer projections above to answer questions 1-4 1) Which of the following pairs represent enantiomers? a) I & II b) I & III c) II & IV d) I & V e) II & V 2) Which statement is TRUE about I & IV? a) They are enantiomers. b) They are diastereomers. c) They are the same. d) They are not isomers. e) They represent a meso structure. 3)...
1. Which molecules below are aromatic? Select one: I and 11 I, II and III II and III III and 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...
Which of the following compounds would you expect to be antiaromatic? (i) cyclooctatetraene (ii) 1,3-cyclooctadiene (iii) cyclooctatetraenyl dianion (iv) 1-ethenylcyclooctatetraene (v) 1,3,5,7-octatetraene Select one: a. i only b. i, ii, iv and v only c. iii only d. i and iv only e. all the above From my working I found i, ii, iv, and v to be non aromatic and iii to be aromatic. Is non aromatic the same as antiaromatic?
Week 10- Constitutional isomers Constitutional isomers have the same molecular formula, but their atoms are bonded in different orders. These may be further distinguished as chain isomers, which differ only in hydrocarbon chain structure, positional isomers, which differ in the location of a functional group, and functional group isomers which differ in the nature of their functional groups. Typically chain and position isomers show only modest differences in their physical and chemical properties, while functional group isomers differ greatly from...
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
2-chloro-6-isopropylcyclohexanone 9. Which of the following molecules contain one chiral carbon? oEif OH но NH но II IV V (a) I only (b) I and III (c) I, II, III, and V (d) I, II, IV, and V (e) all of them CHE120 RRC S19 E2sample
D. Question 7 Which of the molecules below are structural isomers? Н Н H-C-H н-с-н Hннн Hнн Hн н-с-с-с-с-н н-с-с-с-с-н н-с-с-с-н нннн нннн ннн || Н Н-С-н н H н-с-с-с-н ннн 1 1 1 1 III III IV I and II I and IV I, III, and IV I and III