Dichotomous Reactivity of PCl<sub>5</sub>and PBr<sub>5</sub>Toward Cyclic Ketones: A One-Step Preparation of 1,1,2-Trichlorocycloalkanes
作者:Alan B. Brown、Chris W. Chronister、Diana M. Watkins、Richard J. Mazzaccaro、Scott R. Rajski、Martha G. Fountain、Scott E. McKay、Tracy L. Gibson
DOI:10.1080/00397919508011382
日期:1995.2
Abstract Small-ring cyclic ketones react with excess PCl5 in CCl4 (reflux, 1-3 d) to give the corresponding 1,1,2-trichlorocycloalkanes, but react with PBr5 to give ketones brominated in the α-positions.
TWO ATOM BRIDGED DICARBONATE COMPOUNDS AS INTERNAL DONORS IN CATALYSTS FOR POLYPROPYLENE MANUFACTURE
申请人:Coalter, III Joseph N.
公开号:US20130245306A1
公开(公告)日:2013-09-19
A compound suitable for use as an internal electron donor having a structure:
wherein R
1
is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; R
2
is independently at each occurrence, a hydrogen atom or aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; and R3 is an aliphatic hydrocarbyl group having 1 to 3 carbon atoms.
A method for identifying a catalyst composition for use in the heterogeneous Ziegler-Natta addition polymerization of an olefin monomer, said catalyst composition comprising a procatalyst comprising a magnesium and titanium containing procatalyst and a cocatalyst said method comprising: a) providing a library comprising at least one procatalyst compound, b) forming a catalyst composition library by contacting the member of said procatalyst library with one or more cocatalysts and contacting the resulting mixture with an olefin monomer under olefin polymerization conditions thereby causing the polymerization reaction to take place, c) measuring at least one variable of interest during the polymerization, and d) selecting the catalyst composition of interest by reference to said measured variable.
Substituted 1-(Azolin-2-yl)-Amino-1,2-Heterocyclyl-Ethane Compounds For Combating Pests
申请人:Kordes Markus
公开号:US20100041700A1
公开(公告)日:2010-02-18
The present invention relates to 1-(Azolin-2-yl)-amino-1,2-heterocyclyl-ethane compounds, which are useful for combating insects, arachnids and nematodes. The present invention also relates to methods for combating animal pests and to compositions for combating animal pests. It has been found that animal pests can be combated by 1-(Azolin-2-yl)-amino-1,2-heterocyclyl-ethane compounds of the general formula (I): wherein A is a radical of the formulae A
1
or A
2
: and wherein X is sulfur, oxygen or NR
7
, and Het
A
, Het
B
and R
1
to R
7
are defined as in the description.
THREE AND FOUR ATOM BRIDGED DICARBONATE COMPOUNDS AS INTERNAL DONORS IN CATALYSTS FOR POLYPROPYLENE MANUFACTURE
申请人:Coalter, III Joseph N.
公开号:US20110130529A1
公开(公告)日:2011-06-02
A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure:
[R
1
—O—C(O)—O—]
x
R
2
wherein R
1
is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; x is 2-4; and R
2
is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms, provided that there are from 3 to 4 atoms in the shortest chain connecting a first R
1
—O—C(O)—O— group and a second R
1
—O—C(O)—O— group.