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Ishida S, Kato Y, Iwamoto T. A 1,2-Dibromosilene: Generation, Spectroscopic Observation, and Isomerization to a Silacyclohexane via Facile 1,2-Bromine Shift. CHEM LETT 2017. [DOI: 10.1246/cl.170409] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
| | - Yushi Kato
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
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Kulyk K, Zettergren H, Gatchell M, Alexander JD, Borysenko M, Palianytsia B, Larsson M, Kulik T. Dimethylsilanone Generation from Pyrolysis of Polysiloxanes Filled with Nanosized Silica and Ceria/Silica. Chempluschem 2016; 81:1003-1013. [PMID: 31968802 DOI: 10.1002/cplu.201600229] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/06/2016] [Indexed: 11/11/2022]
Abstract
Temperature-programmed desorption mass spectrometry (TPD MS) was used to study the pyrolysis of PDMS and its composites with nanosized silica and ceria/silica. The results suggest that the elusive organosilicon compound, dimethylsilanone, is generated from PDMS over a broad temperature range (in some cases starting at 70 °C). The presence of nano-oxides catalyzes this process. Ions characteristic of the fragmentation of dimethylsilanone under electron ionization are assigned with the aid of DFT structure calculations. Possible reaction mechanisms for dimethylsilanone generation are discussed in the context of the calculated kinetic parameters. Observed accompanying products of PDMS pyrolysis, such as tetramethylcyclodisiloxane and hexamethylcyclotrisiloxane, indicate that multiple channels are involved in the dimethylsilanone release.
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Affiliation(s)
- Kostiantyn Kulyk
- Department of Physics, Stockholm University, 106 91, Stockholm, Sweden
| | | | - Michael Gatchell
- Department of Physics, Stockholm University, 106 91, Stockholm, Sweden
| | - John D Alexander
- Department of Physics, Stockholm University, 106 91, Stockholm, Sweden
| | - Mykola Borysenko
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - Borys Palianytsia
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - Mats Larsson
- Department of Physics, Stockholm University, 106 91, Stockholm, Sweden
| | - Tetiana Kulik
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
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Czyzewski M, Bower J, Box M, Ottosson H, Steel PG. Silene equivalents through the rhodium-catalysed reactions of α-hypersilyl diazoesters: a computational and experimental study. Chem Sci 2011. [DOI: 10.1039/c1sc00405k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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4
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Tanaka H, Ichinohe M, Sekiguchi A. Silylcarbene-to-Silene Rearrangement: Stable 1,2-Dihydrosilenes in Solution via the Silylcarbene Route. CHEM LETT 2008. [DOI: 10.1246/cl.2008.1246] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schmohl K, Reinke H, Oehme H. Reaction of the (Dichloromethyl)oligosilanes R(Me3Si)2Si−CHCl2 (R = Me, Ph, Me3Si) with Organolithium Reagents and the Synthesis of Novel Kinetically Stabilized Silenes. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(200102)2001:2<481::aid-ejic481>3.0.co;2-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Leigh WJ, Kerst C, Boukherroub R, Morkin TL, Jenkins SI, Sung K, Tidwell TT. Substituent Effects on the Reactivity of the Silicon−Carbon Double Bond. Substituted 1,1-Dimethylsilenes from Far-UV Laser Flash Photolysis of α-Silylketenes and (Trimethylsilyl)diazomethane. J Am Chem Soc 1999. [DOI: 10.1021/ja984277z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- William J. Leigh
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Corinna Kerst
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Rabah Boukherroub
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Tracy L. Morkin
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Stephen I. Jenkins
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Kuangsen Sung
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
| | - Thomas T. Tidwell
- Contribution from the Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University of Toronto, Ontario, Canada M5S 3H6
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