The reactions of the cyclopentenones 3,4-dimethylcyclopentenone, 1-indanone, and 2-indanone with mono- and dilithioferrocene lead to the synthesis of cyclopentadienyl-substituted ferrocenes: (3,4-dimethyl-cyclopenta-1,3-dienyl)ferrocene (1), (1-indenyl)ferrocene (3), (2-indenyl)ferrocene (4), and 1,1'-bis(3,4-dimethylcyclopenta-1,3-dienyl)ferrocene (2). The crystal structure of compound 2 was determined. The crystal data are as follows: C24H26Fe, triclinic, P1BAR, a = 7.561 (2) angstrom, b = 10.738 (2) angstrom, c = 13.005 (3) angstrom = 102.05 (3)-degrees, beta = 104.29 (3)-degrees, gamma- 108.84 (3)-degrees, V = 919.1 (4) angstrom3, Z = 2, R = 0.0279, and R(W) = 0.0398 on the basis of 2336 reflections with F greater-than-or-equal-to 4-sigma-(F). It displays an unusual cofacial arrangement of the two 3,4-dimethylcyclopenta-1, 3-dienyl rings. The lithium salt of 1 reacts with FeCl2 to give the triferrocenyl bis(1-ferrocenyl-3,4-dimethylcyclopentadienyl)ferrocene (5). The reaction of the dilithium salt of 2 with FeCl2 yields a mixture of polymeric ferrocenes.
New Insight into the Hydrocarbon-Pool Chemistry of the Methanol-to-Olefins Conversion over Zeolite H-ZSM-5 from GC-MS, Solid-State NMR Spectroscopy, and DFT Calculations
作者:Chao Wang、Yueying Chu、Anmin Zheng、Jun Xu、Qiang Wang、Pan Gao、Guodong Qi、Yanjun Gong、Feng Deng
DOI:10.1002/chem.201403972
日期:2014.9.22
Overzeolite H‐ZSM‐5, the aromatics‐based hydrocarbon‐pool mechanism of methanol‐to‐olefins (MTO) reaction was studied by GC‐MS, solid‐state NMR spectroscopy, and theoretical calculations. Isotopic‐labeling experimental results demonstrated that polymethylbenzenes (MBs) are intimately correlated with the formation of olefin products in the initial stage. More importantly, three types of cyclopentenyl
通过GC-MS,固态NMR光谱和理论计算研究了H-ZSM-5沸石上甲醇到烯烃(MTO)反应的基于芳烃的烃池机理。同位素标记的实验结果表明,聚甲基苯(MBs)在初始阶段与烯烃产物的形成密切相关。更重要的是,首次通过固态NMR光谱法鉴定了三种类型的环戊烯基阳离子(1,3-二甲基环戊烯基,1,2,3-三甲基环戊烯基和1,3,4-三甲基环戊烯基阳离子)和五甲基苯甲鎓离子。在共同进料([ 13 C 6 ]苯和甲醇)条件下和典型的MTO工作(进料[ 13C]甲醇)条件。13 C标记实验显示了MBs(从二甲苯到四甲基苯)和碳阳离子(三甲基环戊烯基和五甲基苯离子)的可比反应性,证明它们通过配对机制共同作用产生丙烯。DFT理论计算也支持基于芳烃的完整催化循环中的配对路线。
Catalysts
申请人:——
公开号:US20030225275A1
公开(公告)日:2003-12-04
The invention describes ligands of formula (I), wherein LIG represents an &eegr;
5
-ligand substituted by a group R
1
and a group (R″)
m
; X represents a 1 to 3 atom bridge; Y represents a nitrogen or phosphorus atom; Z represents a carbon, nitrogen or phosphorus atom.
Transition metal complexes, ligands, catalysts for olefin polymerization, and process for production of olefin polymers
申请人:Hanaoka Hidenori
公开号:US20060111525A1
公开(公告)日:2006-05-25
A transition metal complex represented by the formula (1):
wherein M is a Group 4 transition metal, A is a Group 16 element, B is a Group 14 element, n is an integer of 0 or 1, R
1
, R
2
, R
3
and R
4
may be the same or different and each independently denotes a substituent selected from the group consisting of the groups (I) and (II):
group (I): hydrogen, alkyl and so on group (II): alkoxy, alkylthio and so on,
provided that at least one of R
1
, R
2
, R
3
and R
4
is a substituent selected from group (II);
R
5
, R
6
, R
7
, R
8
R
9
, R
10
, X
1
and X
2
may be the same or different and are each hydrogen, halogen, alkyl or the like; and a catalyst for olefin polymerization comprising said complex, an organoaluminum compound and a boron compound are provided.
Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
申请人:——
公开号:US20040242410A1
公开(公告)日:2004-12-02
The present invention relates to a transition metal complex represented by the formula (I):
1
wherein M represents a Group 4 transition metal;
—Y— represents
(a): —C(R
1
)(R
20
)-A-,
(b): —C(R
1
)(R
20
)-A
1
(R
30
)—,
(c): —C(R
1
)=A
1
-, or
(d): —C(R
1
)=A
1
-A
2
-R
30
;
A represents a Group 16 element and A
1
and A
2
each represents a Group 15 element;
R
1
to R
9
, R
20
, and R
30
are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X
1
and X
2
are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C
1-10
alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
Transition metal complexes, ligands, polymerization catalysts for olefins, and process for production of olefin polymers
申请人:Hanaoka Hidenori
公开号:US20050154158A1
公开(公告)日:2005-07-14
A transition metal complex represented by the formula (1):
wherein M is a Group 4 transition metal, A is a Group 16 element, B is a Group 14 element, n is an integer of 0 or 1, R
1
, R
2
, R
3
and R
4
may be the same or different and each independently denotes a substituent selected from the group consisting of the groups (I) and (II):
group (I): hydrogen, alkyl and so on, group (II): alkoxy, alkylthio and so on,
provided that at least one of R
1
, R
2
, R
3
and R
4
is a substituent selected from group (II);
R
5
, R
6
, R
7
, R
8
, R
9
, R
10
, X
1
and X
2
may be the same or different and are each hydrogen, halogen, alkyd or the like; and a catalyst for olefin polymerization comprising said complex, an organoaluminum compound and a boron compound are provided.