Bis(cyclopentadienyl)-chromium(ii) which has been adsorbed on an inorganic oxide carrier with lithium alkyl or aryl, or a hydride of a metal of main groups i to iii of the periodic table of elementsdoi:US6197901 B1in which the cyclopentadienyl rings may carry inert organic radicals, said ...
•Aryl:Xisbondedtosp 2 carbononbenzenering. Examples: C H H H C H H Br alkylhalide CC H H H Cl vinylhalide I arylhalide PolarityandReactivity •HalogensaremoreelectronegativethanC. •Carbon-halogenbondispolar,socarbonhas partialpositivecharge. ...
(18-31) including some potentially sensitive functional groups and useful synthetic handles, such as ketone (22), acetal (27), tertiary amine (30), chloride (20), nitrile (23), alkenes (25and26), phosphate (28), sulfone (29) and boronic ester (31), which can provide a good chance ...
“arylalkyl” refers to a radical containing both aliphatic and aromatic structures, the radical being at an alkyl position. The term “alkylaryl” refers to a radical containing both aliphatic and aromatic structures, the radical being at an aryl position. Nonlimiting examples of weaker Lewis ...
As emulsifying and/or foam-forming agents there may be used non-ionic and anionic emulsifiers, such as polyoxyethylene-fatty acid esters, polyoxyethylene-fatty alcohol ethers, for example alkylaryl polyglycol ethers, alkyl sulphonates, alkyl sulphates, aryl sulphonates as well as albumin hydrolysis ...
groups other than methyl groups may be present, for example, C2-C18alkyl groups, preferably C2-4alkyl groups, aryl groups, and the like. In addition, and also as is the case for the linear polysiloxanes, functional groups which do not interfere with the stability of the organopolysiloxane ...
organic magnesium compound) with a compound of the formula; (R2N)2B-X [X is a halogen; R is H, a (substituted) 1-10C alkyl, aryl, alkenyl or the like] and bringing the resulting compound into contact with a nitrogen compound having at least one of NH2 groups.;COPYRIGHT: (C)1994,...
Alkyl benzenes having at least 3 alkyl groups are produced by condensing an aromatic hydrocarbon feed having at least 2 alkyl groups per molecule and having at least one unsubstituted nuclear hydrogen atom per molecule with formaldehyde to form a di-arylmethane, subjecting the diarylmethane to ...
Thereafter the catalyst is reduced by any of several various and well known reducing agents such as, for example, CO, H2, NH3, H2 S, CS2, CH3 SCH3, CH3 SSCH3, metal alkyl containing compounds such as R3 Al, R3 B,R2 Mg, RLi, R2 Zn, where R is alkyl, alkoxy, aryl and the ...
Preparation of alkylamines, where, in a first process stage, an olefin is reacted with ammonia, a primary amine and/or a secondary amine under hydroaminating conditions, and then, in a second process stage, the resulting hydroamination product(s) is/are reacted under transalkylating conditions...