New titaniumcomplexes of general formula [(ArO)nTi(Oi-Pr)(4−n)] were synthesized and used as pre-catalysts for the selectivedimerization of ethylene to 1-butene. The complexes were prepared in cyclohexane using [Ti(Oi-Pr)4] and one or two equivalents of the corresponding phenols (ArOH) at room temperature. In this work, both monodentate and chelating phenols were evaluated. For alkyl-substituted
合成了新的通式[(ArO)n Ti(O i -Pr)(4- n) ]的钛配合物,并将其用作乙烯选择性二聚为氯代甲烷的预催化剂。1-丁烯。复合物是在环己烷使用钛[Ti(O我-Pr)4 ],在室温下相应的酚类(aroH的)的一个或两个当量。在这项工作中,评估了单齿酚和螯合酚。对于烷基取代的苯酚,它证明了在两个大的空间位阻的邻和邻'位选择性地得到单取代物[(ARO)的Ti(O我-Pr)3 ]。取代只在其中一个邻位允许两个单-和二-取代的钛复合物的位置,以进行分离。当在苯酚骨架引入的杂原子,二取代发生系统除了与酚呈现hemilabile -CH 2 NR2组在邻位。在用3当量活化。ALET的3在20巴和60℃下,所有的复合物选择性地二聚乙烯1-丁烯 (> 86%的丁烯,其中99% 1-丁烯)。与[Ti(O i -Pr)4 ]相比,配体邻位的空间体积增加或官能团的引入导致活性降低。
PROCESS FOR OLIGOMERIZATION OF OLEFINS THAT USES A CATALYTIC COMPOSITION THAT COMPRISES AN ORGANOMETALLIC COMPLEX THAT CONTAINS A PHENOXY LIGAND THAT IS FUNCTIONALIZED BY A HETEROATOM
申请人:Cazaux Jean-Benoit
公开号:US20110213190A1
公开(公告)日:2011-09-01
The invention describes a process for oligomerization of the olefins into compounds or into a mixture of compounds of general formula CpH2p with 4≦p≦80 that implements a catalytic composition that comprises at least one organometallic complex of an element of group IV that is selected from among titanium, zirconium, or hafnium, whereby said organometallic complex contains at least one aryloxy-type (or phenyloxy-type) ligand that is functionalized by a heteroatom that is selected from among nitrogen, oxygen, phosphorus or sulfur or by an aromatic group.
Synthesis and investigation of antioxidant properties of alkylated hydroxybenzyl dodecyl sulfides
作者:A. E. Prosenko、O. I. Dyubchenko、E. I. Terakh、A. F. Markov、E. A. Gorokh、M. A. Boiko
DOI:10.1134/s0965544106040116
日期:2006.7
Various alkyl-substituted hydroxybenzyl dodecyl sulfides were synthesized, and a comparative study of their antiradical activity in the model reaction of initiated styrene oxidation and the overall inhibiting activity in the thermal autooxidation of white mineral oil was carried out.