摘要:
The present invention includes a composition of matter comprising a sulfide of a metal selected from Groups VIB, VIIB and VIII of the Periodic Tables, or mixtures thereof, and an aromatic, nitrogen-containing heterocyclic compound selected from the group consisting of tetrahydroquinoline, and the mono and diorgano substituted derivatives of tetrahydroquinoline. These compositions are useful as catalyst precursors. Indeed, upon heating at temperatures above 200.degree. C., the compounds are converted to active catalysts useful in polymerizing nitrogen-containing heterocyclic compounds.
摘要:
The present invention includes a composition of matter comprising a sulfide of a metal selected from Groups VIB, VIIB and VIII of the Periodic Tables, or mixtures thereof, and an aromatic, nitrogen-containing heterocyclic compound selected from the group consisting of tetrahydroquinoline, and the mono and diorgano substituted derivatives of tetrahydroquinoline. These compositions are useful as catalyst precursors. Indeed, upon heating at temperatures above 200.degree. C., the compounds are converted to active catalysts useful in polymerizing nitrogen-containing heterocyclic compounds.
摘要:
A new method for the preparation of polyquinoline is discovered. Upon the treatment of tetrahydroquinoline (THQ) with ReS.sub.2+x at the refluxing temperature of THQ, a nearly quantitative yield of polyquinoline is obtained and characterized.
摘要:
The invention relates to fullerene compounds of the following formula: in which X1, X2, X3, X4, X5, Y1, Y2, V, W, F, E, R, r, n, p, and q are defined as in the specification. Also disclosed are pharmaceutical compositions containing one of the compounds described above.
摘要:
The present invention relates to a novel fullerene-derived metallocene. Such fullerene-derived metallocene can be used as the catalyst for preparing olefin polymers.
摘要:
An E-isomeric fulleropyrrolidine compound of formula (I): is disclosed. Also disclosed is a method for preparing and polymers prepared from such a compound.
摘要:
An E-isomeric fulleropyrrolidine compound of formula (I): is disclosed. Also disclosed is a method for preparing and polymers prepared from such a compound.
摘要:
A compound, of the following formula: Also disclosed is a pharmaceutical composition containing a pharmaceutically effective amount of the compound.
摘要:
Quartenized derivatives of oligoquinoline have been reacted with refractory metal oxysalts to generate oligoquinolinium metal oxide salts which provide excellent corrosion inhibition of iron based alloy articles in sulfur containing media.
摘要:
Novel oligomeric quinolinium salts are disclosed. These are formed by reacting quinoline oligomers with alkylating agents such as benzyl halide, p-.alpha.-xylenyl dihalide and alkyl sulfates. The novel oligomeric quinolinium salts are useful as metal corrosion inhibitors, and especially as aqueous acid corrosion inhibitors. The novel compounds are represented by the formulae: ##STR1## wherein n and m are integers, with n being greater than 2 and up to about 200 and m being equal to or greater than 1, R is H or an alkyl group having from 1 to about 20 carbon atoms, R.sup.1 is an alkyl group having 1 to about 20 carbon atoms, X.sup.- is a chloride, bromide or iodide and Z.sup.- is an anion selected from BF.sub.4.sup.-, SO.sub.4.sup.=, ClO.sub.4.sup.-, PF.sub.6.sup.- and HSO.sub.4.sup.-.