RE: Fluorine chemical shifts

Richard Shoemaker (rshoe@wwitch.unl.edu)
Thu, 24 Sep 1998 17:01:05 -0500

Old (but good) reference for 19F chemical shifts is "Compilation of =
Reported F19 Chemical Shifts, 1951 to Mid-1967)", by Claude Dungan and =
John Van Wazer, Wiley-Interscience, 1970. Even though it's old, the =
F19 shifts haven't changed _that_much with age <grin>

If you get this book, be sure to read the introduction carefully, as the =
numbers are sign-reversed (upfield is downfield by today's standards).

Here are a few useful ones (with CFCl3 as zero), using "upfield" as =
negative wrt. reference:

CF3COOH -76.55 ppm
C6F6 -163.0 or -164.9 ppm depending on who's reference you use
(-164.9 ppm is listed for use as reference standard)
C6H5F -113.15
SiF4 -163.3
SF6 +57.42

I hope this helps.

Rich Shoemaker
----
Richard Shoemaker, Ph.D. Phone--(402) 472-6255
Instrumentation Director, Chemistry FAX---- -6964
Research Associate Professor, Chemistry
University of Nebraska-Lincoln =20
URL: http://www.chem.unl.edu/nmrlab.html =20

-----Original Message-----
From: Alvicler Magalhaes [SMTP:calvin@dq.ufscar.br]
Sent: Thursday, September 24, 1998 2:54 PM
To: ammrl@wwitch.unl.edu
Subject: Fluorine chemical shifts

Dear NMR people,

There is any person working with fluorine spectras and have the
chemical shift to CF3CO2H, or tables about fluorine spectra?
Is it possible to send me this references or only this chemical shift?
Thanks for all
Best regards
Lepro
________________________________________________________________________

Alvicler Magalhaes

Laboratorio de Ressonacia Magnetica Nuclear =20
Departamento de Quimica=20
Universidade Federal de Sao Carlos - Brazil

Fone: +55 16 2608208 ext. 246
Fax: +55 16 2608350

e-mail: calvin@dq.ufscar.br
calvin@ernst.dq.ufscar.br
________________________________________________________________________

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