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COLLEGE CHEMISTRY FACULTIES Seventh Edition
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Just published! The new edition of CCF, containing the most current information on: 2,200 departments of chemistry, chemical engineering, biochemistry, and pharmaceutical/medicinal chemistry in the US and Canada, including: • complete mailing addresses and phone numbers • separate listings for each department • department chair a n d head listings • degrees granted by each department • notation for two- and three-year colleges • alphabetical listings by state 17,000 faculty members in these departments,
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periments that were impossible several years ago are now routine. A 13C natu ral abundance NMR spectrum of 5 mg of cholesterol can now be obtained in about 10 min; selective enhancement experiments, needed for the assign ment of the various resonance lines, re quire another 15-30 min. Five or six years ago the same sample would have required 10-12 h of spectrometer time to accumulate the simple 13C spectrum. The assignment of individual reso nance lines would have taken addition al days or weeks. In the June 1 issue of ANALYTICAL CHEMISTRY we will describe the NMR experiments that provide the ba sis for two-dimensional F T - N M R and will discuss several useful examples. These experiments provide a wealth of new information and are especially useful for large molecules for which the one-dimensional NMR spectra are too complex to be interpreted. References (1) Noggle, J. H.; Schirmer, R. E. The Nu clear Ouerhauser Effect; Academic Press: New York and London, 1971. (2) Packer, K.G.R.; Wessels, P. L. J. Magn. Reson. 1973,12,337. (3) Sorenson, S.; Hansen, R. S.; Jakobsen, H. J. J. Magn. Reson. 1974,14, 243. (4) Morris, G. Α.; Freeman, R. J. Am. Chem. Soc. 1979,101,760. (5) Burum, D. P.; Ernst, R. R. J. Magn. Reson. 1980,39,163. (6) Doddrell, D. M.; Pegg, D. M.; Bendall, M. R. J. Magn. Reson. 1982,48,323. (7) Bodenhausen, G. Prog. Nuc. Magn. Re son. Spectres. 1981,14,137. (8) Doddrell, D. M.; Pegg, D. T. J. Am. Chem. Soc. 1980,102,6388.
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690 A · ANALYTICAL CHEMISTRY, VOL. 59, NO. 10, MAY 15, 1987
Thomas C. Farrar is professor of ana lytical and physical chemistry at the University of Wisconsin-Madison. He received his B.Sc. degree from Wichita State University and his Ph.D. in physical chemistry from the Universi ty of Illinois-Urbana. From 1959 to 1961 he was a National Science Foun dation postdoctoral Fellow at the De partment of Theoretical Chemistry, Cambridge University. His current re search interests are in FT-NMR, FTMS, and data analysis methods (Fou rier transforms, maximum entropy, linear prediction, and autoregression) in analytical chemistry.
