New aspects of parahydrogen-induced polarization for C2—C3 hydrocarbons using metal complexes

K. V. Kovtunov; D. B. Burueva; S. V. Sviyazov; O. G. Salnikov; B. M. Goodson; E. Y. Chekmenev; I. V. Koptyug

doi:10.1007/s11172-021-3357-2

New aspects of parahydrogen-induced polarization for C₂—C₃ hydrocarbons using metal complexes

K. V. Kovtunov, D. B. Burueva, S. V. Sviyazov, O. G. Salnikov, B. M. Goodson, E. Y. Chekmenev, I. V. Koptyug

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

Аннотация

The parahydrogen-induced polarization technique allows one to significantly enhance the NMR signal. Novel results on the parahydrogen-induced polarization of C₂—C₃ hydrocarbons using metal complexes are presented. Gaseous propane with the nuclear spin polarization level of at least 0.8% can be produced by bubbling parahydrogen through a solution of propylene and a homogeneous hydrogenation catalyst. Hydrogenation of acetylene with parahydrogen over Wilkinson’s catalyst can result in the formation of hyperpolarized ethylene. The shape of the NMR lines indicates that this reaction proceeds as a syn-addition of molecular hydrogen. The reactions of several ethylene complexes of rhodium and platinum with parahydrogen were studied. The [Rh(η²-C₂H₄)₂Cl]₂ complex reacts with parahydrogen to form hyperpolarized ethane, whereas [Pt(η²-C₂H₄)(PPh₃)₂] converts to the hyperpolarized dihydride complex cis-[Pt(H)₂(PPh₃)₂].

Язык оригинала	английский
Страницы (с-по)	2382-2389
Число страниц	8
Журнал	Russian Chemical Bulletin
Том	70
Номер выпуска	12
DOI	https://doi.org/10.1007/s11172-021-3357-2
Состояние	Опубликовано - дек. 2021

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title = "New aspects of parahydrogen-induced polarization for C2—C3 hydrocarbons using metal complexes",

abstract = "The parahydrogen-induced polarization technique allows one to significantly enhance the NMR signal. Novel results on the parahydrogen-induced polarization of C2—C3 hydrocarbons using metal complexes are presented. Gaseous propane with the nuclear spin polarization level of at least 0.8% can be produced by bubbling parahydrogen through a solution of propylene and a homogeneous hydrogenation catalyst. Hydrogenation of acetylene with parahydrogen over Wilkinson{\textquoteright}s catalyst can result in the formation of hyperpolarized ethylene. The shape of the NMR lines indicates that this reaction proceeds as a syn-addition of molecular hydrogen. The reactions of several ethylene complexes of rhodium and platinum with parahydrogen were studied. The [Rh(η2-C2H4)2Cl]2 complex reacts with parahydrogen to form hyperpolarized ethane, whereas [Pt(η2-C2H4)(PPh3)2] converts to the hyperpolarized dihydride complex cis-[Pt(H)2(PPh3)2].",

keywords = "hydrogenation, hyperpolarization, metal complexes, NMR, parahydrogen, parahydrogen-induced polarization",

author = "Kovtunov, {K. V.} and Burueva, {D. B.} and Sviyazov, {S. V.} and Salnikov, {O. G.} and Goodson, {B. M.} and Chekmenev, {E. Y.} and Koptyug, {I. V.}",

note = "Funding Information: This work was financially supported by the Russian Foundation for Basic Research (Projects No. 19-29-10003 and No. 19-53-12013). Publisher Copyright: {\textcopyright} 2021, Springer Science+Business Media LLC.",

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New aspects of parahydrogen-induced polarization for C₂—C₃ hydrocarbons using metal complexes. / Kovtunov, K. V.; Burueva, D. B.; Sviyazov, S. V. и др.

В: Russian Chemical Bulletin, Том 70, № 12, 12.2021, стр. 2382-2389.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

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AU - Chekmenev, E. Y.

AU - Koptyug, I. V.

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PY - 2021/12

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N2 - The parahydrogen-induced polarization technique allows one to significantly enhance the NMR signal. Novel results on the parahydrogen-induced polarization of C2—C3 hydrocarbons using metal complexes are presented. Gaseous propane with the nuclear spin polarization level of at least 0.8% can be produced by bubbling parahydrogen through a solution of propylene and a homogeneous hydrogenation catalyst. Hydrogenation of acetylene with parahydrogen over Wilkinson’s catalyst can result in the formation of hyperpolarized ethylene. The shape of the NMR lines indicates that this reaction proceeds as a syn-addition of molecular hydrogen. The reactions of several ethylene complexes of rhodium and platinum with parahydrogen were studied. The [Rh(η2-C2H4)2Cl]2 complex reacts with parahydrogen to form hyperpolarized ethane, whereas [Pt(η2-C2H4)(PPh3)2] converts to the hyperpolarized dihydride complex cis-[Pt(H)2(PPh3)2].

AB - The parahydrogen-induced polarization technique allows one to significantly enhance the NMR signal. Novel results on the parahydrogen-induced polarization of C2—C3 hydrocarbons using metal complexes are presented. Gaseous propane with the nuclear spin polarization level of at least 0.8% can be produced by bubbling parahydrogen through a solution of propylene and a homogeneous hydrogenation catalyst. Hydrogenation of acetylene with parahydrogen over Wilkinson’s catalyst can result in the formation of hyperpolarized ethylene. The shape of the NMR lines indicates that this reaction proceeds as a syn-addition of molecular hydrogen. The reactions of several ethylene complexes of rhodium and platinum with parahydrogen were studied. The [Rh(η2-C2H4)2Cl]2 complex reacts with parahydrogen to form hyperpolarized ethane, whereas [Pt(η2-C2H4)(PPh3)2] converts to the hyperpolarized dihydride complex cis-[Pt(H)2(PPh3)2].

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KW - hyperpolarization

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