2311quiz2b 2009 - Chemistry 2311, Spring 2009 Student Name...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Student Name ______________________________ Last Name of TA _______________ Quiz #2 (50 pts) 1. Consider the Grignard Reaction below which is a variation of the one performed in 2311 lab. Fill in the missing intermediates and product. +5 pts H 3 CO Br Mg o diethyl ether + C CH 2 CH 3 O H 3 CO 1) 2) H 3 O + +2 pts +3 pts A B C H 3 CO MgBr H 3 CO OH OCH 3 a. List three specifics experimental techniques that would be important to use to assure a good yield of product. +3 pts Lots of possible answers – key consideration is excluding water from the reaction. Dry glassware use anhydrous ether use drying tubes crush Mg keep reagents and glassware away from moisture from the air Add bromobenzene dropwise to prevent coupling. b. A student wanted to check the purity of starting material B so obtained an NMR of the compound. Assign all peaks to the spectrum below. Label the hydrogens in the structure (H a , H b , etc. . and draw arrows to the corresponding peaks. 10 pts
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/20/2010 for the course CHEM 2311 taught by Professor Wissinger during the Spring '10 term at University of Minnesota Duluth.

Page1 / 3

2311quiz2b 2009 - Chemistry 2311, Spring 2009 Student Name...

This preview shows document pages 1 - 2. Sign up to view the full document.

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