The invention relates to a method for producing cationic silicon (II) compounds of general formula I
(R.sup.aSi).sup.+HA.sup.(I) by reacting the silicon (II) compounds of general formula II
(R.sup.bH)(R.sup.aSi).sup.+(II) with a hydride acceptor compound A, wherein R.sup.a, (R.sup.bH) and A have the definitions described in claim 1;
to the cationic silicon (II) compounds of general formula I and use thereof as catalysts.

The present teachings relate to a functionalized silyl cyanide and synthetic methods thereof. As an example, the method may include adding a raw material silane and a cyanide source MCN in an organic solvent to produce the functionalized silyl cyanide in the absence of catalyst or in the presence of a metal salt catalyst. The functionalized silyl cyanide may be used in the reactions that classic TMSCN participates in, to synthesize important intermediates (e.g., cyanohydrin, amino alcohols and -amino nitrile compounds), with improved reactivity and selectivity. The cyanosilyl ether resulted from the nucleophilic addition of functionalized silyl cyanide to aldehyde or ketone may undergo intramolecular reaction under appropriate conditions to transfer the functional groups on silicon onto the other parts of the product linked to silicon. Such a functional group transfer process may increase the synthesis efficiency and atom economy, as well as afford products unobtainable using traditional TMSCN.

A SiH-free vinyldisilane compound, which is free of (lacks) a silicon-bonded hydrogen atom. The use of the SiH-free vinyldisilane compound, or a collection of such compounds, as a starting material or precursor for synthesizing or making silicon-heteroatom compounds. The silicon-heteroatom compounds synthesized therefrom; films of and devices containing the silicon-heteroatom compounds; methods of making the SiH-free vinyldisilane compound, silicon-heteroatom compounds, films, and devices; and uses of the SiH-free vinyldisilanes, silicon-heteroatom compounds, films, and devices.

A nonaqueous electrolytic solution comprising a cyclobutenedione derivative represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents an organic group having a carbon-carbon double bond or a carbon-carbon triple bond in its structure, and R.sup.2 represents an alkyl group having 1-6 carbon atoms, an alkoxy group having 1-6 carbon atoms, a thioalkyl group having 1-6 carbon atoms, a substituted or unsubstituted thioaryl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group.

Disclosed are halo substituted derivative compounds of sobetirome with improved pharmacological characteristics relative to sobetirome, pharmaceutical compositions that include those compounds and methods of treating diseases such as neurodegenerative disorders using those pharmaceutical compositions.

Provided are a polycyclic compound and an organic electroluminescence device including the same. The polycyclic compound according to an exemplary embodiment of the present disclosure is represented by the following formula 1. ##STR00001## In Formula 1, X is O, SiRR, S, or BAr.sub.1. At least one of R.sub.1 to R.sub.8 is an aryl amine-containing electron donor. When X is O, SiRR, or S, the aryl amine-containing electron donor further includes a Si.

The invention relates to a method for producing cationic silicon(II) compounds of general formula I

(R.sup.aSi).sup.+HA.sup.(I) by reacting the silicon(II) compounds of general formula II

(R.sup.b-H)(R.sup.aSi).sup.+(II) with a hydride acceptor compound A, wherein R.sup.a, (R.sup.b-H) and A have the definitions described in claim 1;
to the cationic silicon(II) compounds of general formula I and use thereof as catalysts.

The present invention provides a transition metal compound, a catalyst composition comprising the same, and a method for producing an olefin polymer using the catalyst composition, the transition metal compound being capable of exhibiting high activity in olefin polymerization reaction, and also being capable of easily controlling the physical properties of an olefin polymer. When the transition metal compound is used, it is possible to provide an olefin polymer having an excellent energy-saving effect at the time of processing or molding.

A semiconducting composition comprising a semiconducting polymer and a semiconducting non-polymeric polycyclic compound, wherein the semiconducting polymer comprises units of A and/or B:

##STR00001##

wherein R.sub.1, R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, x, y, p, q, r, R.sub.3, R.sub.4, R.sub.9, R.sub.10 and R.sub.11 have any of the meanings defined in the description.

Provided are boron-containing compounds. Also provided are formulations comprising these boron-containing compounds. Further provided are OLEDs and related consumer products that utilize these boron-containing compounds.