lec_3 - LEC THREE INTRODUCTION TO NMR IMPORTANT GENERAL...

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LEC THREE INTRODUCTION TO NMR IMPORTANT GENERAL PRINCIPLES
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Goal: EXAMINE SPECTRA THEN DEDUCE STRUCTURAL FEATURES EXPERIMENTAL DATA AREAS COUPLING CONSTANTS (A) (J) CHEMICAL SHIFTS RELAXATION TIMES ( δ ) (T 1 T 2 )
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EXAMINING SPECTRA AREAS (A) WHAT ASSIGNMENTS? WHAT STRUCTURE?
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EXAMINING SPECTRA AREAS (A)
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EXAMINING SPECTRA AREAS & CHEMICAL SHIFTS (A) ( δ ) WHAT ASSIGNMENTS?
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EXAMINING SPECTRA AREAS COUPLING CONSTANTS (A) (J) CHEMICAL SHIFTS ( δ ) 2.0 1.5 1.0 9 8 7 6 5 4 3 2 1 A C 5 H 8 O 9.90 9.80 A sample labeled Z-pent-3-en-2-one (A), whose the 1 H NMR spectrum is shown below, was used for a synthesis project. YOUR THOUGHTS??
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1. Nuclear Induction or Nuclear Magnetic Resonance (or simply NMR as named by Varian) 2. 1 st demonstration - winter of 1945-46 by - Professors Felix Bloch, William Hansen (Stanford University) (Phys Rev 69 , 127 ( 1946 ) - Professor E. M. Purcell (Harvard) (Phys Rev 69 , 37 ( 1946 ) 3. Nobel Prize in Physics to Bloch and Purcell in 1952 NOW – SOME HISTORY BASIC RESEARCH WAS KEY
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Purcell (1912-1997) & Bloch (1905 - 1983) Discoverer of NMR Signal in Condensed Matter by Observing Energy Absorption Following a 1952 press conference at which Nobel designate Edward M. Purcell described his
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This note was uploaded on 08/06/2008 for the course CHEM 124 taught by Professor Amagata during the Winter '08 term at UCSB.

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lec_3 - LEC THREE INTRODUCTION TO NMR IMPORTANT GENERAL...

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