Exam 1 - 1. Circle the correct answer: (40 pts) (1) Ethyne...

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2 1. Circle the correct answer: (40 pts) (1) Ethyne (or acetylene, HC= CH) does not show IR absorption in the region 2000-2500 cm -1 because: a. C-H stretches occur at lower energetics. b. C= C stretches occur at about 1640 cm -1 c. there is no change in the dipole moment when the C= C bond in ethyne stretches. d. there is a change in the dipole moment when the C= C bond in ethyne stretches. (2) When a high energy electron impacts molecules M in the ionization chamber, what type of species is initially produced? a. cation; b. anion ; c. radical; d. radical cation; e. radical anion (3) How many nuclear spin states are allowed for the 1 H nucleus? a. 1; b. 2; c. 3; d. 4; e. 10 (4) 1 H nuclei located near electronegative atoms tend to be relative to 1 H nuclei which are not. a. shielded; b. deshielded; c. resonanced; d. split (5) The Williamson ether synthesis proceeds via an mechanism. a. S
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This note was uploaded on 11/10/2010 for the course CHE 201 taught by Professor Bong during the Spring '08 term at SUNY Buffalo.

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Exam 1 - 1. Circle the correct answer: (40 pts) (1) Ethyne...

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