PROTON NUCLEAR SPIN RESONANCE SPECTROSCOPY. XI. A CARBON-13 ISOTOPE EFFECT

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Journal of Physical Chemistry (U.S.)

DOI:https://doi.org/10.1021/j100832a505· OSTI ID:4170513

Tiers, G V.D.

The nuclear spin resonance shielding of C-H was determined in (CH/sub 3/ )/sub 4/Si, CH/sub 3/I, CH/sub 2/Cl/sub 2/, and CHCl/sub 3/ f or the isotopes C/ sup 12/ and C/sup 13/. The difference in shielding for these isotopes, T/sub 13/ - T/sub 12/, was +42, +12, +42, and +59 x 10/sup -4/ ppm for the respective compounds. This difference is of the same sign but only about 1/40 as large as the corresponding effect on fluorine. This factor, 1/40, has also been observed for the deuterium isotope effect on proton and fluorine shieldings. (D.L.C.)

• Research Organization: Minnesota Mining & Mfg. Co., St. Paul
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-012573
• OSTI ID: 4170513
• Journal Information: Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 64; ISSN JPCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CARBON 12
CARBON 13
CHEMISTRY
CHLORINE COMPOUNDS
DEUTERIUM
FLUORINE
IODINE COMPOUNDS
ISOTOPE EFFECTS
ISOTOPES
METHYL RADICALS
NUCLEAR MAGNETIC RESONANCE
PROTONS
SHIELDING
SILICON COMPOUNDS
SPECTROSCOPY
SPIN