Oxidative ring contraction of 2-phenyl-1,3-dithiane in ZSM-5: Restricted mobility of 1,2-dithiolane radical cations in zeolite channels

Heinz D. Roth; Kui Shen; Prasad S. Lakkaraju; Lorenzo Fernández

doi:10.1039/a804593c

Oxidative ring contraction of 2-phenyl-1,3-dithiane in ZSM-5: Restricted mobility of 1,2-dithiolane radical cations in zeolite channels

Heinz D. Roth, Kui Shen, Prasad S. Lakkaraju, Lorenzo Fernández

School of Arts and Sciences, Chemistry & Chemical Biology

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

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Abstract

Incorporation of 2-phenyl-1,3-dithiane 1 into ZSM-5 generated 1,2-dithiolane radical cation 2^.+, the EPR spectrum of which shows an orthorhombic powder pattern (g₁ = 2.0293, g₂ = 2.0193, g₃ = 2.0030); each g component showed a 1:4:6:4:1 pattern (a₁ = 10.5, a₂ = 9.3 and a₃ = 9.2 G) due to coupling to four equivalent ¹H nuclei, suggesting that the pseudo-axial and -equatorial α-protons undergo conformational equilibration whereas the sulfur centers are held stationary on the EPR time scale.

Original language	English (US)
Pages (from-to)	2447-2448
Number of pages	2
Journal	Chemical Communications
Issue number	22
DOIs	https://doi.org/10.1039/a804593c
State	Published - Nov 21 1998

All Science Journal Classification (ASJC) codes

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
General Chemistry
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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title = "Oxidative ring contraction of 2-phenyl-1,3-dithiane in ZSM-5: Restricted mobility of 1,2-dithiolane radical cations in zeolite channels",

abstract = "Incorporation of 2-phenyl-1,3-dithiane 1 into ZSM-5 generated 1,2-dithiolane radical cation 2.+, the EPR spectrum of which shows an orthorhombic powder pattern (g1 = 2.0293, g2 = 2.0193, g3 = 2.0030); each g component showed a 1:4:6:4:1 pattern (a1 = 10.5, a2 = 9.3 and a3 = 9.2 G) due to coupling to four equivalent 1H nuclei, suggesting that the pseudo-axial and -equatorial α-protons undergo conformational equilibration whereas the sulfur centers are held stationary on the EPR time scale.",

author = "Roth, {Heinz D.} and Kui Shen and Lakkaraju, {Prasad S.} and Lorenzo Fern{\'a}ndez",

year = "1998",

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doi = "10.1039/a804593c",

language = "English (US)",

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T1 - Oxidative ring contraction of 2-phenyl-1,3-dithiane in ZSM-5

T2 - Restricted mobility of 1,2-dithiolane radical cations in zeolite channels

AU - Roth, Heinz D.

AU - Shen, Kui

AU - Lakkaraju, Prasad S.

AU - Fernández, Lorenzo

PY - 1998/11/21

Y1 - 1998/11/21

N2 - Incorporation of 2-phenyl-1,3-dithiane 1 into ZSM-5 generated 1,2-dithiolane radical cation 2.+, the EPR spectrum of which shows an orthorhombic powder pattern (g1 = 2.0293, g2 = 2.0193, g3 = 2.0030); each g component showed a 1:4:6:4:1 pattern (a1 = 10.5, a2 = 9.3 and a3 = 9.2 G) due to coupling to four equivalent 1H nuclei, suggesting that the pseudo-axial and -equatorial α-protons undergo conformational equilibration whereas the sulfur centers are held stationary on the EPR time scale.

AB - Incorporation of 2-phenyl-1,3-dithiane 1 into ZSM-5 generated 1,2-dithiolane radical cation 2.+, the EPR spectrum of which shows an orthorhombic powder pattern (g1 = 2.0293, g2 = 2.0193, g3 = 2.0030); each g component showed a 1:4:6:4:1 pattern (a1 = 10.5, a2 = 9.3 and a3 = 9.2 G) due to coupling to four equivalent 1H nuclei, suggesting that the pseudo-axial and -equatorial α-protons undergo conformational equilibration whereas the sulfur centers are held stationary on the EPR time scale.

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Oxidative ring contraction of 2-phenyl-1,3-dithiane in ZSM-5: Restricted mobility of 1,2-dithiolane radical cations in zeolite channels

Abstract

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