Chem460 Final Exam 2010

Chem460 Final Exam 2010 - Chem460 Fall, 2009 Prof. Sasaki...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem460 Final Exam Fall, 2009 Name: Prof. Sasaki 150 points Total Only Answers in box will be graded Good luck! 1. (30) (a) The UV spectrum of citral shows two UV maxima at 230 nm ( ε = 11,500) and 320 nm ( ε = 56). H O Citral (i) Circle the chromophore in the structure of citral that is responsible for the above UV bands. (ii) What type of electronic transition is responsible for each of the two absorptions? 230 nm 320 nm (b) A chromatography instrument equipped with a UV/Vis detector operating at 254 nm is being used to separate the reaction products from the reaction given. The solvent system is hexane/diethyl ether (1 : 1). O CH 3 H 3 C MgBr Et 2 O O CH 3 H 3 C + CH 3 H 3 C CH 3 H 3 C OH + (i) Calculate the expected λ max of the starting material by using the table attached. (ii) Which product(s) will be invisible to the UV detector? Briefly provide your reasoning.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Chem460 page 2 2. (30) (a)Show below are the selected IR data and the 13C-NMR data of the side chain of compounds
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2012 for the course CHEM 460AB taught by Professor Sasaki during the Fall '11 term at University of Washington.

Page1 / 10

Chem460 Final Exam 2010 - Chem460 Fall, 2009 Prof. Sasaki...

This preview shows document pages 1 - 3. Sign up to view the full document.

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