Ethylene Tetramerization: A New Route to Produce 1-Octene in Exceptionally High Selectivities
作者:Annette Bollmann、Kevin Blann、John T. Dixon、Fiona M. Hess、Esna Killian、Hulisani Maumela、David S. McGuinness、David H. Morgan、Arno Neveling、Stefanus Otto、Matthew Overett、Alexandra M. Z. Slawin、Peter Wasserscheid、Sven Kuhlmann
DOI:10.1021/ja045602n
日期:2004.11.1
producing 1-hexene and 1-octene is by oligomerization of ethylene, which yields a wide spectrum of linear alpha-olefins (LAOs). While there exists several processes for producing 1-hexene via ethylene trimerization, a similar route for the selective production of 1-octene has so far been elusive. We now, for the first time, report an unprecedented ethylene tetramerization reaction that produces 1-octene
[3LCo(CO)3]+[Co(CO)4]− (3) catalyzes the ethylene oxide hydromethoxycarbonylation into 3-HMP, exhibiting the cobalt-homonuclear ion-pair catalysis mode.
Iridium and rhodium “PNP” aminodiphosphine complexes used as catalysts in the oxidation of styrene
作者:Dunesha Naicker、Holger B. Friedrich、Pramod B. Pansuriya
DOI:10.1039/c6ra01276k
日期:——
a distorted octahedral geometry around the metal centers. These complexes showed good activity in the oxidation of styrene using tert-butyl hydroperoxide (TBHP) as the oxidant. The iridium complexes were more active than the rhodium complexes. Higher yields for benzaldehyde were achieved in comparison to styrene oxide for all catalysts.
Cobalt aminodiphosphine complexes as catalysts in the oxidation of n-octane
作者:Dunesha Naicker、Holger B. Friedrich、Bernard Omondi
DOI:10.1039/c5ra07365k
日期:——
were analyzed using single crystal X-ray diffraction. The geometry around the metal centers in 2a and 2c were distorted tetrahedral. All the complexes showed good activity as catalysts for the oxidation of n-octane using tert-butyl hydroperoxide (TBHP) as the oxidant. The complex bearing the flexible ligand backbone with the cyclohexyl substituent on the nitrogen atom was the most active and showed high
合成了两种类型的钴氨基二膦钴配合物,并通过红外光谱,元素分析和单晶X射线衍射对其进行了表征。这些是[PH 2 PN(R)PPH 2 ]氯化钴2,1和[PH 2 P(CH 2)2 N(R)(CH 2)2 PPH 2 ]氯化钴2,2,其中R = C 6 H ^ 11(a); C 5 H 11(b); C 3 H 7(c)。氮原子(R)上的官能团从环己基环到正戊基烷基链到异丙基支链取代基变化。使用单晶X射线衍射分析复合物2a和2c。2a和2c中金属中心周围的几何形状是扭曲的四面体。使用叔丁基氢过氧化物(TBHP)作为氧化剂,所有配合物均表现出良好的催化正辛烷氧化的活性。带有柔性配体主链且在氮原子上带有环己基取代基的配合物活性最高,并显示出对酮的高选择性,其中2-辛酮为主要产物。
Olefin Oligomerization catalysts and Methods of Making and Using Same
申请人:Sydora Orson L.
公开号:US20120172645A1
公开(公告)日:2012-07-05
This disclosure provides for a process for preparing a catalyst system comprising a) contacting a metal compound, a diphosphino aminyl ligand metal complex, and a metal alkyl for a time period to form a mixture; and b) aging the mixture. The disclosure also provides for olefin oligomerization process comprising: a) contacting i) a metal compound, ii) a diphosphino aminyl ligand, and iii) a metal alkyl to form a mixture; b) aging the mixture; c) contacting the aged mixture with an olefin monomer; and d) forming an olefin oligomer product.