Personal Chemistry

Reek 2007 Angewandt Pd/Zn salen

2008-07-25T14:17:00.004Z

Interesting article by Reek. The sole palladium precatalyst lead to inactive run, while combining it with Zn salen result in productive systems. The change of subsituent of the Zn salen induces different activity and diffeernent molecular weight didtribution. It seems obvious that the steric environment of the pd center would be affected by such bulky groups and that the electronic propertioes of the Pd would also be affected.

Heteromultimetallic Transition Metal Complexes Based on unsymmetrical Pt bis actelyde

2008-06-17T10:23:00.003Z

Quiet an interesting article, with the preparation of several multimetallic complexes. Most of them are based on a Pt center that undergoes a series of addition so as to form the different targeted complexes. While this is quiete a nice and fascinating treat for a synthetic organometallic chemist, they do not mention any potential applications. Still their synthesis route deserves to be carefully examined.

http://pubs.acs.org/cgi-bin/abstract.cgi/orgnd7/asap/abs/om800232m.html

Homo- and Copolymerization of Norbornene andStyrene with Pd- and Ni-Based Novel Bridge Dinuclear Diimine Complexes and MAO

2007-07-19T10:12:00.001Z

The beginning of a series of articles about polynuclear catalysis for the polymerisation of ethylene and olefin in general. As I am currently trying to write some of the work done during my PhD studies and I am revisiting my bibliographic introduction.

Macromol. Chem. Phys. 2003, 204, 868–876

Xia Mi, Zhi Ma,1,2 Leyong Wang, Yucai Ke,1 Youliang Hu

In this article, the authors reports the synthesis of group 10 bimetallic (1-4) and the ir screening for the homo- and co-polymerisation of norbornene and that of styrene with norbornene.

Background:

Norbornene are cyclic unsaturated alkyl that can beused as monomer or comonomer in polymerisation process
monometallic complexes based on transition metal (Ni, Pd, Cr, Zr, Ti, Co, Fe)

Justification of the work:

Unprecedented bimetallic catalysts for polymerisation of norbornene (that is for the designof new catalysts)
the processability can difficult and can be improved by adding some vinyl comonomer (That's for the styrene)

Basically, they try to kill one bird with two stones by trying simulataneously new catalyts and new application in the same paper. Obviously that makes it more difficult to make any valid comparison, but hell that's not always necessary when you have so many new concepts.
In parallele, they try to increase of the use of the word "didentate", after all "bidentate" was also a bit old world...

I'll discuss the resuls tomorrow.

Chemical forum

2007-06-08T09:59:00.000Z

No need to develop I guess, basically a forum about chemistry. There are an abundant amounts of posts and well-organised. I'm not a big fan of forum but it might be interesting to spend some time on it.

http://www.chemicalforums.com/

Hyperbook of organometallic

2007-06-08T09:44:00.000Z

A good website about organometallics chemistry with a lot of information about the main reaction. Surprisingly, nothing about olefin polymerisation.

http://www.ilpi.com/organomet/

ecompound

2007-03-29T15:09:00.001Z

Have found this interesting website for organic chemistry ecompound.

Several interesting aspects for an organometallic chemist:

a lot of organic chemistry reaction describes concisely, which is good if you tend to forget a bit your graduate organic lectures.
a forum dedicated as it is always interesting to see what other fellows discuss. Obviously you have more to understand the forum gibberish that the science.