{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

3AL+Lecture+8 - Structure Determination NMR Spectroscopy...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Structure Determination X-Ray Crystallography NMR Spectroscopy Mass Spectrometry
Image of page 1

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

View Full Document Right Arrow Icon
Spectroscopy Absorption of Electromagnetic Radiation: Something Changes from a Lower Energy State to a Higher Energy State Δ E = h
Image of page 2
Energy ( Δ E = h ) > 300 (kcal) 300 – 40 40 – 2 2 – 0.1 10 -4 X-rays Electronic transitions of core electrons in atoms UV Vis. Electronic transitions of valence electrons Near IR Far IR Micro- waves Vibrational transitions Rotational transitions Radio- waves 10 nm 50 400 800 20 m 1mm 100mm Electromagnetic Spectrum 10 -6 1m
Image of page 3

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

View Full Document Right Arrow Icon
Nuclear Magnetic Resonance (NMR) Spectroscopy Nuclear (spins) Resonating (when electromagnetic radiation is applied) in a Magnetic Field 1 H 13 C 19 F 31 P Δ E = h B o
Image of page 4
Nuclear Spin Nuclei with a spin equal to zero are NMR inactive Nuclei with a spin not equal to zero are NMR active 1 H, 13 C, 15 N, 19 F, 31 P all have a spin equal to 1/2
Image of page 5

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

View Full Document Right Arrow Icon
Spinning Nuclei Spinning Nuclei Create a Small Magnetic Field
Image of page 6
Spin( ½ ) Nuclei in an External Magnetic Field Δ E
Image of page 7

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

View Full Document Right Arrow Icon
E B o Δ E B o and Spin States B
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern