A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under the same conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C. Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structures of A, B, and C, give equations for their formation, and explain the stereospecificity of these reactions
Chapter 6 (Part Two) Exceptions to the Octet Rule Octet Rule: Elements gain or lose electrons to attain a configuration of the nearest noble gas. o More than likely the number of valence electrons will be divisible by 8. The Incomplete Octet o o Since the valence electrons add up to 24, which is divisible by 8, each electron that came from B we can add to each F. Odd – Electron Molecules o Expanded Octet (central atom with quantum number n > 2) o Example 1: Draw the Lewis structure for AlI 3 Still use the four steps to get the Lewis Dot Structure o They will have a total of 24 valence electrons, and after you get done with the steps,
