CONFORMATIONAL STUDIES OF CYCLOBUTANE SYSTEMS, (2006)
Lambert,Joseph B., Roberts,AND John D.
Isolated attempts were made to detect the pre sence of nonplanarity in cyclobutane rings. Significant deviations from planarity were meas ured for cyclobutane, octafluorocyclobutane,...
NITROGEN-15 MAGNETIC RESONANCE SPECTROSCOPY III. (2005)
Lambert,Joseph B., Roberts,Bryan W., Binsch,Gerhard, Roberts,John D.
Certain studies utilizing N15-MR techniques are reviewed and areas for future investigations are suggested.
Lambert, Joseph B., Roberts, John D.
The temperature dependence of the geminal fluorine-fluorine chemical-shift differences in a variety of unsymmetrically substituted cyclobutanes is interpreted in terms of a classical equilibrium...
STEREOCHEMICAL ASPECTS OF THE DIELS-ALDER REACTION, (2005)
Lambert, Joseph B., Roberts, John D.
In the Diels-Alder reaction of hexachlorocyclopentadiene and alpha-methyl-styrene, the cistrans ratio of deuterium in the beta-position of the alkene remains unchanged in the adduct. The reactions of...
Lambert, Joseph B., Roberts, John D.
The imine protons of nitrogen-15 labeled ketimines exhibit temperature-dependent nuclear magnetic resonances. Analysis of the effect of concentration of substrate on the mean lifetime indicates that...
NITROGEN-15 MAGNETIC RESONANCE SPECTROSCOPY. V. OXYGEN-NITROGEN COMPOUNDS. (2005)
Lambert, Joseph B., Roberts, John D.
The N-15 chemical shifts of a series of oxygennitrogen compounds were found to vary over a range of 576 p.p.m. Since the calculated range of the diamagnetic contribution is only 80 p.p.m., the...
Lambert, Joseph B., Roberts, John D.
The observation of substantial temperature variations of vicinal hydrogen-fluorine coupling constants in a series of cyclobutanes is consistent with the existence of an equilibrium between...
NITROGEN-15 MAGNETIC RESONANCE SPECTROSCOPY. VI. PYRIMIDINE DERIVATIVES, (1998)
Roberts, Bryan W., Lambert, Joseph B., Roberts, John D.
Proton and nitrogen-15 magnetic resonance spectra of several derivatives of pyrimidine have been studied. Long-range (15)N-H couplings were observed in uracil-(15)N2, 2,4-dichloropyrimidine-(15)N2,...
NITROGEN-15 MAGNETIC RESONANCE SPECTROSCOPY. II. COUPLING CONSTANTS. (1998)
Binsch,Gerhard, Lambert,Joseph B., Roberts,Bryan W., Roberts,John D.
Coupling constants were measured between nitrogen-15 and directly bonded hydrogen or carbon-13, and between nitrogen-15 and hydrogen separated by two or more bonds. The data may generally be...
Organic structural spectroscopy / Joseph B. Lambert ... [et al.] (1998)
Incluye bibliografía e índice
Archaeological chemistry III / Joseph B. Lambert, editor (1984)
"Based on a symposium sponsered by the Division of the History of Chemistry at the 184th Meeting of the American Chemistry Society, Kansas City, Missori, September 12-17, 1982"
Nitrogen-15 magnetic resonance spectroscopy, I. Chemical shifts (1964)
Lambert, Joseph B., Binsch, Gerhard, Roberts, John D.
Except for the original determination(1) of nuclear moments, nitrogen magnetic resonance spectroscopy has been limited to the isotope of mass number 14. Although N14 is an abundant isotope, it...