initiating Grignards with ultrasonic ... , Hive Chemistry Discourse
 
    psyloxy (Hive Addict) 12-13-01 22:52 No 247231
      initiating Grignards with ultrasonic ... </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247231&Number=247231&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Does anyone here have any experience with the great looking procedure<br>to initiate Grignard-reactions in wet ether with ultrasonic, as outlined<br>in <a href="http://chemistry.mdma.ch/hiveboard/rhodium/chemistry /grignard.wet.html" target="_blank" title="Jump to this external site">../rhodium/chemistry /grignar<wbr>d.wet.ht<wbr>ml</a> ?<br><br>On the other hand some discussion of the topic is also appreciated, since<br>I don't semm to fully understand the whole thing... because it looks so<br>microscale and I don't seem to find the passage in the text where they say<br>"after you've got the micro-reaction going, slowly add more R-MgBr and R-COH<br>to get the real rxn started..."<br><br>I don't need a 40L ultrasonic bath for that purpose, do I ?<br><br>--<b>psyloxy-- </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247234"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> hest<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-13-01 23:12</span><br> <span title="Link to this post by using the markup [247234]">No 247234</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <title>Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247234&Number=247234&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Ultrasound clean's the Mg surface, and as usual the more power you put in the more fun you get's out.<br>But the juveler cleaner (small U.S. bath) works greath too.<br>A Iodine xtal is also greath to promote the Gr.<br>If you use Mg turning, stirring the raw turnings for 12 houers works greath too. (Gives them a big clean surface) </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247236"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> <font color="#FF0033">Rhodium</font><br> <i>(<span title="The user's title at the time of posting">Chief Bee</span>)</i><br> <span title="Posting date">12-13-01 23:14</span><br> <span title="Link to this post by using the markup [247236]">No 247236</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247236&Number=247236&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> It is probably preferable to have an ultrasonic bath the size of your reaction flask, as you need to shake off the oxide layer of all the Mg turnings you are using, but in my opinion it is only necessary to sonicate all the magnesium with say 10% of the alkyl halide, the other 90% of the halide can be added in another flask, if you figure out a clever way of transferring a reacting grignard solution from one flask to another. <br><br>An alternative for large reactions is to use an ultrasonic probe, which you dip into the reaction flask, instead of having the whole flask in a sonicating bath. </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247260"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> hest<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-14-01 00:22</span><br> <span title="Link to this post by using the markup [247260]">No 247260</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247260&Number=247260&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Yep, an 150W old ultrasoundwelding prope is greath<img src="../forum/images/icons_lightgrey/laugh.gif" alt="laugh" title="Laugh" heigth="15" width="15"><br>A seldisrupter is a great tool too </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247269"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> <font color="#FF0033">Rhodium</font><br> <i>(<span title="The user's title at the time of posting">Chief Bee</span>)</i><br> <span title="Posting date">12-14-01 00:37</span><br> <span title="Link to this post by using the markup [247269]">No 247269</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247269&Number=247269&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Hest: What is that? It sounds interesting. </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247296"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> hest<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-14-01 01:19</span><br> <span title="Link to this post by using the markup [247296]">No 247296</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247296&Number=247296&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> I'm not sure, some old ultrasound probe in a box, I found it in a elektr. shop for app 60 euro (yes we have to get use to it <img src="../forum/images/icons_lightgrey/laugh.gif" alt="laugh" title="Laugh" heigth="15" width="15">)<br>I was told that  it was used for weldering small Alluminium pises together. Ill dick up the name.<br> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post247389"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> Aurelius<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-14-01 05:59</span><br> <span title="Link to this post by using the markup [247389]">No 247389</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=247389&Number=247389&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Bwiti, where are your comments for this thread?  </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post248492"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> hest<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-17-01 21:31</span><br> <span title="Link to this post by using the markup [248492]">No 248492</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=248492&Number=248492&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> I't turns out that it is not a weldering machine, but a cell disrupter.<br>Here is a pic.<br><img src="../picproxie_docs/000247231-file_ozjq.jpg"><br><a href="http://www.integratedservices.com/soniprep.htm" target="_blank" title="Jump to this external site">http://www.integratedservices.com/sonipr<wbr>ep.htm</a> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post248494"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> <font color="#FF0033">Rhodium</font><br> <i>(<span title="The user's title at the time of posting">Chief Bee</span>)</i><br> <span title="Posting date">12-17-01 21:34</span><br> <span title="Link to this post by using the markup [248494]">No 248494</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=248494&Number=248494&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Oh, that one looks cheap! <img src="../forum/images/icons_lightgrey/tongue.gif" alt="tongue" title="Tongue" heigth="15" width="15"> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post248497"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> hest<br> <i>(<span title="The user's title at the time of posting">Hive Bee</span>)</i><br> <span title="Posting date">12-17-01 21:43</span><br> <span title="Link to this post by using the markup [248497]">No 248497</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=248497&Number=248497&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> 54$ (used one) </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post248550"></a><a name="last"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> psyloxy<br> <i>(<span title="The user's title at the time of posting">Hive Addict</span>)</i><br> <span title="Posting date">12-18-01 01:21</span><br> <span title="Link to this post by using the markup [248550]">No 248550</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Re: initiating Grignards with ultrasonic ...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=248550&Number=248550&page=83&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> There's also quite a lot on ebay, affordable us-cleaners that can hold a gallon...<br>didn't think so with the article speaking of 470$ for such a real small unit... well<br>it's been a while since then.<br><br><br>--<b>psyloxy</b>-- </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> </body> </html>