5.What would be the product of the following reaction sequence? 1.Br2 2.excess NaNH2 Br -CH Br Ph (racemic) P从Br (meso) C)Ph-C=C-Ph D) Br Ph-CHECph E) Ph、 NH2 CH-CH NH Ph Ans: 6.Given separate pure samples,in what way(s)could you quickly distinguish between the two alkynes below -czc-n and -C=C-D C)ultraviolet spectroscopy Ans:EPage 4 5. What would be the product of the following reaction sequence? CH CH 1. Br2 2. excess NaNH2 ? A) C C Br Br Ph H Ph H (racemic) B) C C Br Br Ph H Ph H (meso) C) Ph C C Ph D) CH C Br Ph Ph E) CH CH NH2 NH2 Ph Ph Ans: C 6. Given separate pure samples, in what way(s) could you quickly distinguish between the two alkynes below? CCH and CCD A) gas chromatography D) NMR spectroscopy B) infrared spectroscopy E) both B and D C) ultraviolet spectroscopy Ans: E