ORGANOMETALLIC COMPOUND AND PRODUCTION METHOD THEREOF
申请人:Ochiai Takashi
公开号:US20120101289A1
公开(公告)日:2012-04-26
It is an object of the present invention to provide a novel organometallic compound functioning usefully as a chain transfer agent and the like in polymerization reaction of a double-bond containing compound. The present invention provides an organometallic compound represented by the following general formula (1) and a production method thereof.
(in the general formula (1), M is a magnesium atom, a zinc atom, an Al—R
11
group, or a Ga—R
11
group; R
1
and R
10
are each independently a hydrocarbon group having 1 to 20 carbon atoms, or R
1
and R
10
may be united with each other to form a divalent connecting group (R
101
) having 4 or more carbon atoms and thus form a ring; R
2
to R
9
are each independently a hydrogen atom, or a hydrocarbon group having 1 to 20 carbon atoms; Q
1
and Q
3
are each independently a divalent hydrocarbon group; Q
2
is a divalent connecting group containing a linkage by a heteroatom excluding carbon; h, j, k, m, and p are each independently 0 or 1; n is an integer of 0 to 10; and r is an integer of 0 to 1000.
Multi- or dual-headed compositions useful for chain shuttling and process to prepare the same
申请人:Dow Global Technologies LLC
公开号:US11359035B2
公开(公告)日:2022-06-14
The present disclosure relates to a process for synthesizing a multi- or dual-headed composition by using an alpha,omega-diene and an organometallic compound in the presence of a catalyst precursor. The present disclosure further relates to use of the compositions, as well as the process to make the same, in olefin polymerization.
Capped multi- or dual-headed compositions useful for chain shuttling and process to prepare the same
申请人:Dow Global Technologies LLC
公开号:US11359038B2
公开(公告)日:2022-06-14
The present disclosure relates to a capped, multi- or dual-headed chain composition comprising derivatives of a strained olefin. The present disclosure further relates to a process for synthesizing the capped, multi- or dual-headed composition by using an organometallic compound and a co-catalyst in the presence of a catalyst precursor and a strained olefin. The present disclosure further relates to use of the compositions, as well as the process to make the same, in olefin polymerization.
This work provides an in-depth investigation of the Pd(II)-catalyzed oxidative cyclization of various alkenoic acids bearing different tethers between the carboxylic acid moiety and the olefin function, showcasing how different mechanistic pathways (oxypalladation or allylic C-H activation) can be operative. The factors biasing toward one or the other of these reactivities are rationally discussed and compared with our recent studies on the Pd(II)-catalyzed intramolecular amination.
ORGANOMETALLIC COMPOUNDS AND PROCESS FOR PREPARATION THEREOF