A PM3 versus AM1 and RHF versus UHF study of the radical reactivity of vinyl monomers

Abstract:: Minisci-type reactions have become widely known as reactions that involve the addition of carbon-centered radicals to basic heteroarenes followed by formal hydrogen atom loss. While the originally developed protocols for radical generation remain in active use today, in recent years by a new array of radical generation strategies allow use of a wider variety of radical precursors that often operate under milder and more benign conditions. New transformations based on free radical reactivity are now available to a synthetic chemist looking to utilize a Minisci-type reaction. Radical-generation methods based on photoredox catalysis and electrochemistry, which utilize thermal cleavage or the in situ generation of reactive radical precursors, have become popular approaches. Our review will cover the remarkably literature that has appeared on this topic in recent 5 years, from 2015-01 to 2020-01, in an attempt to provide guidance to the synthetic chemist, on both the challenges that have been overcome and applications in organic synthesis.

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Palladium Promoted Copolymerization of Carbon Monoxide with Polar or Nonpolar Olefinic Monomers

Current Organic Chemistry ◽

10.2174/1385272824999201102221113 ◽

2020 ◽

Vol 24 ◽

Author(s):

Yanlin Zong ◽

Qiankun Li ◽

Hongliang Mu ◽

Zhongbao Jian

Keyword(s):

Carbon Monoxide ◽

Physical Properties ◽

Vinyl Monomers ◽

Pd Catalysts ◽

Catalytic Systems

Abstract:: The copolymers of carbon monoxide (CO) and olefins, namely polyketones, are a family of widely used materi-als. In the catalytic preparation of these materials, palladium(II) catalysts represent the most successful catalytic systems. The production of both alternating and non-alternating polyketones has been achieved, with great difference in their physical properties. Herein, a variety of palladium(II) catalysts employed for the copolymerization of CO with various olefinic mon-omers such as ethylene, α-olefins, styrene and polar vinyl monomers are fully summarized. The influence of important fac-tors such as solvents and counterions on specific copolymerization, is also discussed. This review aims to enlighten the de-sign of new Pd catalysts with improved properties, as well as the development of new polyketone materials.

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NMR and ESR studies of the solid-state polymerization of vinyl monomers. I. Acrylamide

Journal of Polymer Science Part A-1 Polymer Chemistry ◽

10.1002/pol.1972.150100703 ◽

1972 ◽

Vol 10 (7) ◽

pp. 1905-1922 ◽

Cited By ~ 26

Author(s):

C. Chachaty ◽

A. Forchioni

Keyword(s):

Solid State ◽

Vinyl Monomers ◽

Solid State Polymerization

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Cold Plasma Deposition of Polymeric Nanoprotrusion, Nanoparticles, and Nanofilm Structures on a Slide Glass Surface

Processes ◽

10.3390/pr9010099 ◽

2021 ◽

Vol 9 (1) ◽

pp. 99

Author(s):

Sun-Woo Yi ◽

In-Keun Yu ◽

Woon-Jung Kim ◽

Seong-Ho Choi

Keyword(s):

Contact Angle ◽

Visible Light ◽

Methyl Methacrylate ◽

Cold Plasma ◽

Plasma Deposition ◽

Vinyl Monomers ◽

Glass Slides ◽

Structure Surface ◽

One Step ◽

Coated Surface

In this study, we coated the surface of glass slides with nanoprotrusion, nanoparticles, and nanofilm structures by one-step plasma deposition of three vinyl monomers. Three functional vinyl monomers with symmetrical polarity sites were used: methyl methacrylate (MMA), trifluoro methylmethacrylate (TFMA), and trimethylsilyl methyl methacrylate (TSMA). The TSMA/MMA (80/20, mol-%) nanoprotrusion-coated surface of slide glass was superhydrophobic, with a 153° contact angle. We also evaluated the transmittance (%) of the slide glass with nanoprotrusions in the infrared (IR) (940 nm), ultraviolet (365 nm) and visible light (380–700 nm) regions. The obtained nanoprotrusion structure surface of slide glass created by plasma deposition transmits more than 90% of visible light.

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