Carbon-13 Magnetic Shielding from Beam-Maser Measurements of Spin-Rotation Interaction in Acetonitrile

S. G. Kukolich; G. Lind; M. Barfield; L. Faehl; J. L. Marshall

doi:10.1021/ja00491a005

Carbon-13 Magnetic Shielding from Beam-Maser Measurements of Spin-Rotation Interaction in Acetonitrile

S. G. Kukolich, G. Lind, M. Barfield, L. Faehl, J. L. Marshall

Chemistry and Biochemistry

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20 Scopus citations

Abstract

The J=I → 0 transitions in CH₃¹³CN were observed using a beam maser spectrometer at 6-kHz line width (fwhm) and a ¹³C-enriched sample. The strongest component was observed with natural-abundance CH₃¹³CN. Spectra of CH₃¹²CN were obtained at higher resolution using Ramsey—s method of separated oscillating fields. For CH₃¹²CN we obtain eqQ_N = -4224.4 ± 0.7 kHz, C_N=2.0 ± 0.4 kHz, C_H=-0.6 ± 0.4 kHz, and a J=1 → 0 transition center frequency of 18 397 783.5 ± 0.7 kHz. For CH₃,¹³CN the J=1 → 0 transition center frequency is 18 388 681.0 ± 2.0 kHz and we obtain eqQ_N=-4224.6 ± 1kHz and C_N=1.9 ± 0.5 kHz. The ¹³C spin-rotation strength in CH₃¹³CN was determined in this study to be 3.6 ± 0.2 kHz and this leads to a value of σ⊥=- 11 ± 14 ppm.

Original language	English (US)
Pages (from-to)	7155-7159
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	100
Issue number	23
DOIs	https://doi.org/10.1021/ja00491a005
State	Published - 1978

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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@article{d87cf8b95e584ed695623e00960cdffa,

title = "Carbon-13 Magnetic Shielding from Beam-Maser Measurements of Spin-Rotation Interaction in Acetonitrile",

abstract = "The J=I → 0 transitions in CH313CN were observed using a beam maser spectrometer at 6-kHz line width (fwhm) and a 13C-enriched sample. The strongest component was observed with natural-abundance CH313CN. Spectra of CH312CN were obtained at higher resolution using Ramsey—s method of separated oscillating fields. For CH312CN we obtain eqQN = -4224.4 ± 0.7 kHz, CN=2.0 ± 0.4 kHz, CH=-0.6 ± 0.4 kHz, and a J=1 → 0 transition center frequency of 18 397 783.5 ± 0.7 kHz. For CH3,13CN the J=1 → 0 transition center frequency is 18 388 681.0 ± 2.0 kHz and we obtain eqQN=-4224.6 ± 1kHz and CN=1.9 ± 0.5 kHz. The 13C spin-rotation strength in CH313CN was determined in this study to be 3.6 ± 0.2 kHz and this leads to a value of σ⊥=- 11 ± 14 ppm.",

author = "Kukolich, {S. G.} and G. Lind and M. Barfield and L. Faehl and Marshall, {J. L.}",

year = "1978",

doi = "10.1021/ja00491a005",

language = "English (US)",

volume = "100",

pages = "7155--7159",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "23",

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TY - JOUR

T1 - Carbon-13 Magnetic Shielding from Beam-Maser Measurements of Spin-Rotation Interaction in Acetonitrile

AU - Kukolich, S. G.

AU - Lind, G.

AU - Barfield, M.

AU - Faehl, L.

AU - Marshall, J. L.

PY - 1978

Y1 - 1978

N2 - The J=I → 0 transitions in CH313CN were observed using a beam maser spectrometer at 6-kHz line width (fwhm) and a 13C-enriched sample. The strongest component was observed with natural-abundance CH313CN. Spectra of CH312CN were obtained at higher resolution using Ramsey—s method of separated oscillating fields. For CH312CN we obtain eqQN = -4224.4 ± 0.7 kHz, CN=2.0 ± 0.4 kHz, CH=-0.6 ± 0.4 kHz, and a J=1 → 0 transition center frequency of 18 397 783.5 ± 0.7 kHz. For CH3,13CN the J=1 → 0 transition center frequency is 18 388 681.0 ± 2.0 kHz and we obtain eqQN=-4224.6 ± 1kHz and CN=1.9 ± 0.5 kHz. The 13C spin-rotation strength in CH313CN was determined in this study to be 3.6 ± 0.2 kHz and this leads to a value of σ⊥=- 11 ± 14 ppm.

AB - The J=I → 0 transitions in CH313CN were observed using a beam maser spectrometer at 6-kHz line width (fwhm) and a 13C-enriched sample. The strongest component was observed with natural-abundance CH313CN. Spectra of CH312CN were obtained at higher resolution using Ramsey—s method of separated oscillating fields. For CH312CN we obtain eqQN = -4224.4 ± 0.7 kHz, CN=2.0 ± 0.4 kHz, CH=-0.6 ± 0.4 kHz, and a J=1 → 0 transition center frequency of 18 397 783.5 ± 0.7 kHz. For CH3,13CN the J=1 → 0 transition center frequency is 18 388 681.0 ± 2.0 kHz and we obtain eqQN=-4224.6 ± 1kHz and CN=1.9 ± 0.5 kHz. The 13C spin-rotation strength in CH313CN was determined in this study to be 3.6 ± 0.2 kHz and this leads to a value of σ⊥=- 11 ± 14 ppm.

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DO - 10.1021/ja00491a005

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VL - 100

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 23

ER -

Carbon-13 Magnetic Shielding from Beam-Maser Measurements of Spin-Rotation Interaction in Acetonitrile

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