An NMR study of He2 inside C70

Anthony Khong; Hugo A. Jiménez-Vázquez; Martin Saunders; R. James Cross; Julia Laskin; Tikva Peres; Chava Lifshitz; Rob Strongin; Amos B. Smith

doi:10.1021/ja980142h

An NMR study of He₂ inside C₇₀

Anthony Khong, Hugo A. Jiménez-Vázquez, Martin Saunders, R. James Cross, Julia Laskin, Tikva Peres, Chava Lifshitz, Rob Strongin, Amos B. Smith

Escuela Nacional de Ciencias Biológicas (ENCB)

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

A peak in the helium NMR spectrum of ³He labeled C₇₀ is assigned to molecules containing two helium atoms. The concentration of the dihelium species is about 1/20th that of molecules containing a single helium, and the helium shift of this new species is 0.014 ppm (5.6 Hz) downfield from the resonance for molecules containing one helium. Mass spectrometry confirms the presence of dilabeled molecules. A HirschBingel transformation of the C₇₀ to a malonate diethyl ester increases the chemical shift difference between the mono- and dihelium species.

Original language	English
Pages (from-to)	6380-6383
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	120
Issue number	25
DOIs	https://doi.org/10.1021/ja980142h
State	Published - 1 Jul 1998

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title = "An NMR study of He2 inside C70",

abstract = "A peak in the helium NMR spectrum of 3He labeled C70 is assigned to molecules containing two helium atoms. The concentration of the dihelium species is about 1/20th that of molecules containing a single helium, and the helium shift of this new species is 0.014 ppm (5.6 Hz) downfield from the resonance for molecules containing one helium. Mass spectrometry confirms the presence of dilabeled molecules. A HirschBingel transformation of the C70 to a malonate diethyl ester increases the chemical shift difference between the mono- and dihelium species.",

author = "Anthony Khong and Jim{\'e}nez-V{\'a}zquez, {Hugo A.} and Martin Saunders and Cross, {R. James} and Julia Laskin and Tikva Peres and Chava Lifshitz and Rob Strongin and Smith, {Amos B.}",

year = "1998",

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T1 - An NMR study of He2 inside C70

AU - Khong, Anthony

AU - Jiménez-Vázquez, Hugo A.

AU - Saunders, Martin

AU - Cross, R. James

AU - Laskin, Julia

AU - Peres, Tikva

AU - Lifshitz, Chava

AU - Strongin, Rob

AU - Smith, Amos B.

PY - 1998/7/1

Y1 - 1998/7/1

N2 - A peak in the helium NMR spectrum of 3He labeled C70 is assigned to molecules containing two helium atoms. The concentration of the dihelium species is about 1/20th that of molecules containing a single helium, and the helium shift of this new species is 0.014 ppm (5.6 Hz) downfield from the resonance for molecules containing one helium. Mass spectrometry confirms the presence of dilabeled molecules. A HirschBingel transformation of the C70 to a malonate diethyl ester increases the chemical shift difference between the mono- and dihelium species.

AB - A peak in the helium NMR spectrum of 3He labeled C70 is assigned to molecules containing two helium atoms. The concentration of the dihelium species is about 1/20th that of molecules containing a single helium, and the helium shift of this new species is 0.014 ppm (5.6 Hz) downfield from the resonance for molecules containing one helium. Mass spectrometry confirms the presence of dilabeled molecules. A HirschBingel transformation of the C70 to a malonate diethyl ester increases the chemical shift difference between the mono- and dihelium species.

UR - http://www.scopus.com/inward/record.url?scp=2642677633&partnerID=8YFLogxK

U2 - 10.1021/ja980142h

DO - 10.1021/ja980142h

M3 - Artículo

SN - 0002-7863

VL - 120

SP - 6380

EP - 6383

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 25

ER -

An NMR study of He₂ inside C₇₀

Abstract

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