questions3_fa10_ans

questions3_fa10_ans - September 16, 2010 Conference...

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September 16, 2010 Conference Questions 3 Answers 1. Each of the following molecules or ions contains at least one C-N bond. The following two questions are based on the Lewis structures of these species. a) H 2 CNCH 3 b) H 3 CCN c) (H 3 C) 4 N + d) (H 2 N) 3 C + Which molecule or ion has the longest C-N bond? Which molecule or ion has the shortest C-N bond? Structures: B is the shortest and C is the longest (sp 3 vs sp 2 ) CN CH 3 3 N NH 2 H 2 N 2 2. The molecular orbitals for methanol (HOCH 3 ) are shown below. They are arranged from lowest energy (A) to highest (J). Which orbital would react with H + G--the HOMO Which two orbitals contain the lone pairs? F and G Which orbital is the HOMO? G Which orbital is the LUMO? H
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3 . Complete the following reaction (show formal charges): AlCl 3 + CH 3 OCH 3 ? Cl Al Cl Cl O 4 . What are the HOMO and LUMO of the first and second steps of the
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questions3_fa10_ans - September 16, 2010 Conference...

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