Ozonolysis of 5-bromo- and 5-ethoxy-2-phenyloxazoles. The products and the reaction mechanism

The ozonolysis of 2-phenyloxazoles having the good leaving group as an anion at C-5 position gave mainly N-benzoylisocyanate ( 2 ) with the formation of carbon dioxide.     

Chemistry of organosilicon compounds XCVI. The SiSi/SiSi Metathesis reaction catalyzed by palladium complexes

1,1,2,2-Tetramethyl-1,2-disilacyclopentane undergoes the SiSi/SiSi metathesis reaction with vinyl- or ethynyl-substituted disilanes in the presence of a palladium complex.     

Chemistry of organosilicon compounds : LXXX. Useful modifications in the preparation of trimethylsilylsodium and trimethylsilylpotassium

New procedures for preparation of trimethylsilylsodium and trimethylsilylpotassium, which gave coupling products with primary and secondary alkyl chlorides in high yields, are reported.     

Deformation Quantizations of the Poisson Algebra of Laurent Polynomials

It is well known that the Moyal bracket gives a unique deformation quantization of the canonical phase space R2n up to equivalence. In his presentation of an interesting deformation quantization of the Poisson algebra of Laurent polynomials, Ovsienko discusses the equivalences of deformation quantizations of these algebras. We show that under suitable conditions, deformation quantizations of this algebra are equivalent. Though Ovsienko showed that there exists a deformation quantization of the Poisson algebra of Laurent polynomials which is not equivalent to the Moyal product, this is not correct. We show this equivalence by two methods: a direct construction of the intertwiner via the star exponential and a more standard approach using Hochschild 2-cocycles.     

Chemistry of organosilicon compounds: CIV. Syntheses of novel organoelement heterocycles containing titanium and silicon

Four new dicyclopentadienyltitanium(IV) metallocycles, Cp₂TiCH₂XCH₂ (X = SiMe₂OSiMe₂, SiMe₂CH₂SiMe₂, SiMe₂SiMe₂, and SiMe₂SiMe₂SiMe₂) are prepared and characterized.     

Application of arsenic to electrophotoreceptors

Arsenic has been applied to many electronic devices such as electrophotoreceptors, gallium arsenide (GaAs) semiconductors and solid-state image pickup devices. For electrophotoreceptors selenium–arsenic (Se? As) alloys are coated onto the conductive substrate of the receptors. Arsenic is mostly used in electophotoreceptors in electronic devices. During the coating process, a part of the gaseous arsenic is released through an exhaust system. In order to avoid arsenic being discharged to the atmosphere, bag filters and high-efficiency particulate air filters are set before the exhaust port. Any arsenic which still exists in the waste water after washing tools and jigs from the coating process is collected by sedimentation before discharging. The Ames salmonella/microsome plate test for As₂Se₃ indicated no mutagenic activity under the test system used. For the safety of workers engaged in arsenic-related jobs, they received a medical examination once every six months. No negative trends from the examination was found in 428 men who received the examination from Autumn 1980 to Spring 1987.     

Photochemical generation of tetramethyldisilene and photoinduced 1,2-silyl-migration

Described herein is the first clear evidence of the photochemical generation of tetramethyldisilene which can be efficiently trapped by dienes. An intriguing 1,2-photo-induced silyl migration is also reported.