Adenine has a molar extinction coefficient of 7020 mol dm–3 cm–1 at a wavelength of 265 nm and a characteristic NH2 bending vibration at 1650 cm–1. Show your working for each stage of this question. a) Calculate the transmission of 265 nm light through a 2.0×10–4 molar solution of adenine in a 0.5 cm wide cuvette. b) Calculate, ω, the fundamental frequency of the NH2 bend (in s–1).

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions
Section20.3: Uv-visible Spectroscopy
Problem 20.5P
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Adenine has a molar extinction coefficient of 7020 mol dm–3 cm–1 at a wavelength of 265 nm and a characteristic NH2 bending vibration at 1650 cm–1. Show your working for each stage of this question.

a) Calculate the transmission of 265 nm light through a 2.0×10–4 molar solution of adenine in a 0.5 cm wide cuvette.

b) Calculate, ω, the fundamental frequency of the NH2 bend (in s–1).

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