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 ...
and wherein the remaining R groups are taken from the group consisting essentially of hydrogen, C1-C20cyclic or acyclic alkyl and alkenyl, aryl, NH2, acylamido, halogen, acyl, NO2, YO and YS where Y is hydrogen, acyl, alkoxycarbonyl, phenyl and C1-C20cyclic or acyclic alkyl and alkenyl...
amethyl group(n=1, CH3) is a fragment of a methane molecule (CH4).Alkylating agentsuse selectivealkylationby adding the desired aliphatic carbon chain to the previously chosen starting molecule. This is one of many known chemical syntheses. Alkyl groups can also be removed in a process known ...
<p>To solve the question regarding the reaction of alkyl halides with dialkyl copper reagents, we can break it down into a step-by-step explanation.</p><p><strong>Step 1: Understanding the Reactants</strong> - <strong>Alkyl Halides</strong>: These are or
In a preferred embodiment the linked nucleophilic residue (y) can be: ##STR10## wherein R1, R2, R1', and R2' can be hydrogen, aryl or alkyl. In this manner, by using a graft-onto reaction scheme the graft copolymers of Formula (I) above can then be produced, and more particularl...
(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 ...
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,...
2-aryl-2-cyano-2-(aryloxyalkyl)ethyl-1,2,4-triazoles of the formula ##STR1## wherein Ar<sup>1</sup> and Ar<sup>2</sup> are optionally substituted aryl groups which may or may not be different, R is hy
When the term “carbocycle” is used, it is intended to include “aryl”. A bridged ring occurs when one or more, preferably one to three, carbon atoms link two non-adjacent carbon atoms. Preferred bridges are one or two carbon atoms. It is noted that a bridge always converts a ...