Isoparaffin-olefin alkylation was investigated using liquid as well as solid onium poly(hydrogen fluoride) catalysts. These new immobilized anhydrous HF catalysts contain varied amines and nitrogen-containing polymers as complexing agents. The liquid poly(hydrogen fluoride) complexes of amines are typical ionic liquids, which are convenient media and serve as HF equivalent catalysts with decreased volatility for isoparaffin-olefin alkylation. Polymeric solid amine:poly(hydrogen fluoride) complexes are excellent solid HF equivalents for similar alkylation acid catalysis. Isobutane-isobutylene or 2-butene alkylation gave excellent yields of high octane alkylates (up to RON = 94). Apart from their excellent catalytic performance, the new catalyst systems significantly reduce environmental hazards due to the low volatility of complexed HF. They represent a new, "green" class of catalyst systems for alkylation reactions, maintaining activity of HF while minimizing its environmental hazards.

Symmetric organic bis-sulfides were prepared via reductive thiolation of dicarbonyl compounds with thiols or of carbonyl compounds with dithiols in the presence of triethylsilane and boron trifluoride monohydrate.

[7647-18-9] Cl5Sb (MW 299.02) InChI = 1S/5ClH.Sb/h5*1H;/q;;;;;+5/p-5 InChIKey = VMPVEPPRYRXYNP-UHFFFAOYSA-I (Lewis acid,1 catalyst for Friedel–Crafts reactions, isomerization, and other Lewis acid related chemistry;1 chlorinating agent; acid system for the preparation of stable carbocation and onium salts1) Alternate Name: antimony pentachloride Physical Data: bp 92 °C/30 mmHg. Solubility: sol chloroform, carbon tetrachloride. Form Supplied in: colorless or slightly yellow oily liquid; commercially available. Handling, Storage, and Precautions: SbCl5 is a corrosive, toxic, and moisture sensitive substance. It can be purified by vacuum distillation. SbCl5 fumes when exposed to atmosphere, and should be stored under anhydrous conditions and handled using proper gloves in a well ventilated hood.

Abstract 9,10‐diphenylphenanthrene product: 9,10‐diphenylphenanthrene

Reactions of aryl pinacols with the superacidic triflic acid give rise to substituted phenanthrenes in good yields.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

The electrophilic fluorination of methane with ''F+'' equivalent N2F+ and NF4+ salts was studied by experiment and theory. Reaction of excess methane with NF4+SbF6- in pyridinium polyhydrogen fluoride solution gave exclusively methyl fluoride. The reaction of N2F+AsF6- and NF4+AsF6- with methane (with 1:2 to 4:1 mole ratio, respectively) in HF solution gave methyl fluoride in 63-92% relative yield with 26-6% methylene fluoride and 2-11% fluoroform with no carbon tetrafluoride formed. In a theoretical study of the CH4 + F+ model reaction stationary points on the potential energy surface were calculated at the QCISD/6-31G*//QCISD/6-31G* + ZPE level. The mechanistic consequences of these reactions are discussed.