CHE202 - Practice Quiz 1 Powerpoint

CHE202 - Practice Quiz 1 Powerpoint - pattern and their...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Selected problems
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 ) Which compound would be expected to show intense IR absorption at 3300 cm 1? ± A) CH3C CCH3 ± B) butane ± C) but 1 ene ± D) CH3CH2C CH Answer D strong CH stretch above 3000 cm 1 sp hybridized carbon
Background image of page 2
6) Ethyne (HC CH) does not show IR absorption in the region 2000-2500 cm-1 because: ± A) C–H stretches occur at lower energies. ± 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. ± Answer C ± Symmetrical molecule
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12) Predict the number of signals expected, splitting
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: pattern and their relative area in the 1H NMR spectrum of 2 methylpropane. A) 2 signals: (9H, doublet); (1H, multiplet) B) 3 signals: (3H, triplet); (3H, triplet); (2H, multiple C) 2 signals: (6H, doublet); (2H, multiplet) C 0.96 0.96 2.01 0.96 1 2 3 PPM 1) C9H9N IR (cm 1): 3050, 2950, 2240, 1630 1H NMR (d): 7.5 (2H, d), 7.1 (2H, d), 2.3 (2H, q), 0.9 (3H, t) 13C NMR (d): 137 (s), 130, (s), 126 (d), 122 (d), 95 (s), 25 (t), 15 3050, SP2 CH stretch 2950, CH stretch 2240, C N 1630 C=C stretch N 7.46 7.46 7.30 7.30 2.59 1.24 1 2 3 4 5 6 7 8 PPM...
View Full Document

Page1 / 5

CHE202 - Practice Quiz 1 Powerpoint - pattern and their...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online