th  - 1987 - 51st ENC Conference

WF52
ANALYSIS OF CONPLBX NIXTURES BY ULTRAHIGH RESOLUTION NNR
Steven R. Naple and Adam Allerhand
Department of Chemistry, Indiana University, Bloomington, IN 47405
Ultra-high resolution NNR methodology has increased the ability of the
NNR spectroscopist to observe minor component peaks of complex mixtures
without the use of "solvent" suppression techniques. It is now possible to
detect minor peaks in the presence of laJor peaks which are 10 a times
larger. Results from the following examples will be discussed: (1) The
observation and kinetics of the aldo] condensation dimer of acetone.
(2) The assignment of individual components in a complex petroleum fraction.
(3) The determination of the equilibrium anomerlc composition of
carbohydrate solutions. These examples cover line widths ranging from very
narrow to those typically encountered in 13C NNR of simple and complex
organic molecules. We will also present information about the
Identification of instrumental artifacts and the demands placed upon the
computer, both in the horizontal (number of data points or words) and
vertical (number of bits per word) directions, by ultra-high resolution NHR
methodology.