CHEM 344 Fall 2010 Mass Spec Lec handout

CHEM 344 Fall 2010 Mass Spec Lec handout - 1 CHEM 344...

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Unformatted text preview: 1 CHEM 344 Organic Chemistry Lab September 7 th 2010 Structural Determination of Organic Compounds Lecture 1 Mass Spectrometry 2 Structure Determination Connectivity/Mass Mass Spec X-ray diffraction NMR Detailed connectivity IR Functional groups UV-vis, Raman, EPR, ATM, STM Molecular Modeling Science , 2009, 325 , 1110 -1114. STM and AFM imaging of pentacene on Cu(111) 3 AFM imaging of cephalandole A Nature Chem. August 2010 C 60 Buckminsterfullerene Buckyball Nature , 1985 , 318 , 162-163 Connectivity/Mass Mass Spec 4 Mass Spectrometry Uses high energy electron beam (70 eV), sample in gas phase Gives info on molecular mass and formula of compound (m/z, isotopes) Gives info on connectivity of molecule (fragmentation pattern) Ionization energy for most organic molecules 8-15 eV Molecular Fragments Molecule Molecular Ion [M] .+ [M] .+ gives the mass (m) of the molecule Fragments give info on connectivity of the molecule 5 32 31 29 15 [M] +....
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This note was uploaded on 02/14/2011 for the course ORGANIC CH 341 taught by Professor Idk during the Spring '11 term at Wisconsin.

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CHEM 344 Fall 2010 Mass Spec Lec handout - 1 CHEM 344...

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