Abstract

The NMR chemical shifts of protons on alkyl groups attached to pyridine rings are discussed. Data on 31 alkylpyridines are included. The spectra and tabulated differential shifts of 15 monosubstituted pyridines in carbon tetrachloride (CCl₄) and hexadeuterobenzene (B_z-<i>d</i>₆) are given; and the data on the chemical shifts and the differential shifts in the solvents CCl₄ and C₆H₆ or B_z-<i>d</i>₆ for the di-, tri-, and tetrasubstituted pyridines are tabulated. A paramagnetic shift is noted for some protons on alkyl groups attached alpha to the pyridine nitrogen. The use of the data in a qualitative identification of two pyridine homologs is demonstrated on a fraction from shale oil.

Petrophysical applications of NMR imaging

William P. Rothwell and H. J. Vinegar
Appl. Opt. 24(23) 3969-3972 (1985)

Infrared and Raman Spectra of Some Tin-Alkyls

C. R. Dillard and J. R. Lawson
J. Opt. Soc. Am. 50(12) 1271-1274 (1960)

Narrowband chemical-shift imaging

Ephraim Feig and Fred Greenleaf
Appl. Opt. 24(23) 3977-3984 (1985)

Synthesis of polyamic acid possessing second-order nonlinear optical properties and its application to Langmuir–Blodgett films

Cheolsoo Jung, Mitsutoshi Jikei, and Masa-aki Kakimoto
J. Opt. Soc. Am. B 15(1) 471-476 (1998)

Anomalous side-shifted multimode spectra in proton-exchanged LiNbO₃ waveguides

M. De Micheli and Philip St. J. Russell
Appl. Opt. 25(21) 3896-3898 (1986)