tag:blogger.com,1999:blog-26491359674696063432024-03-19T03:25:47.776+00:00Personal Chemistryjehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-2649135967469606343.post-27550874543803635042008-07-25T14:17:00.004+00:002008-07-25T15:17:26.516+00:00Reek 2007 Angewandt Pd/Zn salenInteresting <a href="http://www3.interscience.wiley.com/cgi-bin/fulltext/116329161/PDFSTART">article</a> 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. <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPKqZo-wtBT4zF3y2dBHz2peMH2xgDTzZ30lATLVA2IP3fzMVBv1gWM7fdMbVUgU8lCQ6Dti6nfskGzdsyCVtX8HGtKqVnsGIhaCCOBveem-nFF-eLvuFKZYiObATOpYqLZK6bkjHE7eQ/s1600-h/reek+Angewandt+2007+8590.gif"><img id="BLOGGER_PHOTO_ID_5226965739101867202" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPKqZo-wtBT4zF3y2dBHz2peMH2xgDTzZ30lATLVA2IP3fzMVBv1gWM7fdMbVUgU8lCQ6Dti6nfskGzdsyCVtX8HGtKqVnsGIhaCCOBveem-nFF-eLvuFKZYiObATOpYqLZK6bkjHE7eQ/s320/reek+Angewandt+2007+8590.gif" border="0" /></a><br /><div></div>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0tag:blogger.com,1999:blog-2649135967469606343.post-63992673499961085222008-06-17T10:23:00.003+00:002008-06-17T10:41:40.360+00:00Heteromultimetallic Transition Metal Complexes Based on unsymmetrical Pt bis actelyde<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0rFUaR63W-z2xYw1VfySsif8eqiZGbbp70a1FfWz0NVTyUBT8puDGRgXpvzpeyCxRNqZECjPHg4xWYSvVcRuNWE8BzNesKT2xvqsLMh9KUXVO0V3kLK_iSjaFiTPcTsjHgxHHVIqpaV0/s1600-h/Picture1.png"><img id="BLOGGER_PHOTO_ID_5212797053281519634" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0rFUaR63W-z2xYw1VfySsif8eqiZGbbp70a1FfWz0NVTyUBT8puDGRgXpvzpeyCxRNqZECjPHg4xWYSvVcRuNWE8BzNesKT2xvqsLMh9KUXVO0V3kLK_iSjaFiTPcTsjHgxHHVIqpaV0/s320/Picture1.png" border="0" /></a> 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.<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi0OOw1Yu3Wor-kGkqfWih6IN1_V-UQRQ9JjLBU6wuRiT3eI4bW1CmMyqKD9zXA6aTK2u8XyLqI3IYZPVhYhSXjFR0U1GeZoBGiLvmK9BGRwg9Z1lpPREExVZxWuqvCduM0Ar9mo9f3JqM/s1600-h/Picture1.png"></a><br /><div><a href="http://pubs.acs.org/cgi-bin/abstract.cgi/orgnd7/asap/abs/om800232m.html">http://pubs.acs.org/cgi-bin/abstract.cgi/orgnd7/asap/abs/om800232m.html</a><br /><br /></div><div></div>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0tag:blogger.com,1999:blog-2649135967469606343.post-64965079925191512202007-07-19T10:12:00.001+00:002007-07-19T10:54:54.025+00:00Homo- and Copolymerization of Norbornene andStyrene with Pd- and Ni-Based Novel Bridge Dinuclear Diimine Complexes and MAO<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpj7ad4whvbBNPDUy7dt-V6hHPUidaS7NOGyM_9ZJKRu-WrNznr2HqzPG4pm5_JoiIGZ0CaD7eM1fXTdvwWuIUbUQqH5a3qB7yYZ5CjQiKtfaAeekV0VTEEH7r6IDNmnpdxY3y39KfDzs/s1600-h/Scheme+1.gif"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpj7ad4whvbBNPDUy7dt-V6hHPUidaS7NOGyM_9ZJKRu-WrNznr2HqzPG4pm5_JoiIGZ0CaD7eM1fXTdvwWuIUbUQqH5a3qB7yYZ5CjQiKtfaAeekV0VTEEH7r6IDNmnpdxY3y39KfDzs/s320/Scheme+1.gif" alt="" id="BLOGGER_PHOTO_ID_5088859469140854802" border="0" /></a><br /> <p class="MsoNormal" style="margin-bottom: 12pt;"><span style="color: rgb(35, 31, 32);font-family:Arial;" >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.</span><span style="font-family:Arial;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-family:Arial;"><a href="http://doi.wiley.com/10.1002/macp.200390057"><span style="color: rgb(35, 31, 32);">Macromol. Chem. Phys. 2003, 204, 868–876</span></a></span><span style="color: rgb(35, 31, 32);font-family:Arial;" > </span><span style="font-family:Arial;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(35, 31, 32);font-family:Arial;" >Xia Mi, Zhi Ma,1,2 Leyong Wang, Yucai Ke,</span><span style="color: rgb(35, 31, 32);font-family:Arial;" >1 </span><span style="color: rgb(35, 31, 32);font-family:Arial;" >Youliang Hu<br /><br /><br />In this article, the authors reports the synthesis of group 10 bimetallic (<b>1</b>-<b>4</b>) and the ir screening for the homo- and co-polymerisation of norbornene and that of styrene with norbornene. </span><span style="color: rgb(35, 31, 32);font-family:Arial;" ><br /></span><span style="font-family:Arial;"><br /></span><span style="color: rgb(35, 31, 32);font-family:Arial;" > <!--[if !supportLineBreakNewLine]--> <!--[endif]--></span><span style="font-family:Arial;"><o:p></o:p></span></p> <p class="MsoNormal" style="text-align: center;" align="center"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgACnK-krMYHsl9uJgmpMVIocuS86K0kLLbv22Q0Z57U53Fd8Fmtfo1vWG8abDxcwxXO_8p00u1eWOoKArvKWA9nYNWuH61E4_BmA1vbgDVD5NKHmnhoLRWYsWrtqDxi3ieXIdoWJ2aulw/s1600-h/Scheme+1.gif" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><span style="text-decoration: none;font-family:Arial;" ><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" spt="75" preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"> <v:f eqn="sum @0 1 0"> <v:f eqn="sum 0 0 @1"> <v:f eqn="prod @2 1 2"> <v:f eqn="prod @3 21600 pixelWidth"> <v:f eqn="prod @3 21600 pixelHeight"> <v:f eqn="sum @0 0 1"> <v:f eqn="prod @6 1 2"> <v:f eqn="prod @7 21600 pixelWidth"> <v:f eqn="sum @8 21600 0"> <v:f eqn="prod @7 21600 pixelHeight"> <v:f eqn="sum @10 21600 0"> </v:formulas> <v:path extrusionok="f" gradientshapeok="t" connecttype="rect"> <o:lock ext="edit" aspectratio="t"> </v:shapetype><v:shape id="BLOGGER_PHOTO_ID_5088848980830717954" spid="_x0000_i1025" type="#_x0000_t75" alt="" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgACnK-krMYHsl9uJgmpMVIocuS86K0kLLbv22Q0Z57U53Fd8Fmtfo1vWG8abDxcwxXO_8p00u1eWOoKArvKWA9nYNWuH61E4_BmA1vbgDVD5NKHmnhoLRWYsWrtqDxi3ieXIdoWJ2aulw/s1600-h/Scheme+1.gif" style="'width:174pt;height:150pt'" button="t"> <v:imagedata src="file:///C:/DOCUME~1/jep/LOCALS~1/Temp/msoclip1/01/clip_image001.gif" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgACnK-krMYHsl9uJgmpMVIocuS86K0kLLbv22Q0Z57U53Fd8Fmtfo1vWG8abDxcwxXO_8p00u1eWOoKArvKWA9nYNWuH61E4_BmA1vbgDVD5NKHmnhoLRWYsWrtqDxi3ieXIdoWJ2aulw/s320/Scheme+1.gif"> </v:shape><![endif]--><!--[if !vml]--><br /><!--[endif]--></span></a></p> <p class="MsoNormal"><b><span style="color: rgb(35, 31, 32);font-family:Arial;" >Background:</span><o:p></o:p></b></p> <ul type="disc"><li class="MsoNormal" style=""><span style="font-family:Arial;">Norbornene are cyclic unsaturated alkyl that can beused as monomer or comonomer in polymerisation process<o:p></o:p></span></li><li class="MsoNormal" style=""><span style="font-family:Arial;">monometallic complexes based on transition metal (Ni, Pd, Cr, Zr, Ti, Co, Fe)<o:p></o:p></span></li></ul> <p class="MsoNormal"><span style="color: rgb(35, 31, 32);font-family:Arial;" ><br /></span><b><span style="color: rgb(35, 31, 32);font-family:Arial;" >Justification of the work:</span><o:p></o:p></b></p> <ul type="disc"><li class="MsoNormal" style=""><span style="font-family:Arial;">Unprecedented bimetallic catalysts for polymerisation of norbornene (that is for the designof new catalysts)<o:p></o:p></span></li><li class="MsoNormal" style=""><span style="font-family:Arial;">the processability can difficult and can be improved by adding some vinyl comonomer (That's for the styrene)<o:p></o:p></span></li></ul> <span style=";font-family:Arial;font-size:12;" >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.<br />In parallele, they try to increase of the use of the word "didentate", after all "bidentate" was also a bit old world...<br /><br />I'll discuss the resuls tomorrow. <!--[if !supportLineBreakNewLine]--> <!--[endif]--></span><span style="font-size:100%;"><span style="font-family:arial;"> </span> </span>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0tag:blogger.com,1999:blog-2649135967469606343.post-12171904919212639462007-06-08T09:59:00.000+00:002007-06-08T10:02:50.695+00:00Chemical forumNo 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.<br /><br /><a href="http://www.chemicalforums.com/">http://www.chemicalforums.com/</a>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0tag:blogger.com,1999:blog-2649135967469606343.post-47354486529730594342007-06-08T09:44:00.000+00:002007-06-08T09:46:39.582+00:00Hyperbook of organometallicA good website about organometallics chemistry with a lot of information about the main reaction. Surprisingly, nothing about olefin polymerisation.<br /><br /><br /><a href="http://www.ilpi.com/organomet/">http://www.ilpi.com/organomet/</a>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0tag:blogger.com,1999:blog-2649135967469606343.post-47605708773635485242007-03-29T15:09:00.001+00:002007-06-08T10:10:08.492+00:00ecompound<div>Have found this interesting website for <span class="blsp-spelling-corrected" id="SPELLING_ERROR_0">organic</span> chemistry <a href="http://www.ecompound.com/index.htm"><span class="blsp-spelling-error" id="SPELLING_ERROR_1">ecompound</span>.</a></div>Several interesting aspects for an <span class="blsp-spelling-error" id="SPELLING_ERROR_2">organometallic</span> chemist: <ul> <li>a lot of organic chemistry reaction describes concisely, which is good if you tend to <span class="blsp-spelling-corrected" id="SPELLING_ERROR_3">forget</span> a bit your graduate organic lectures.</li> <li>a forum dedicated as it is always <span class="blsp-spelling-corrected" id="SPELLING_ERROR_4">interesting</span> to see what other fellows discuss. Obviously you have <span class="blsp-spelling-error" id="SPELLING_ERROR_5">more</span> to understand the forum gibberish that the science.<br /></li></ul>jehttp://www.blogger.com/profile/06349593139770275256noreply@blogger.com0