| 06:14 PM | alchemia: | helle 1 am chemist |
| 01:30 PM | emma1991: | can anybody name me a reagent which can change a ketone to a secondary alchol |
| 01:29 PM | emma1991: | can anybody name me a reagent which can change a ketone to a secondary alchol |
| 01:29 PM | emma1991: | can anybody name me a reagent which can change a ketone to a secondary alshol |
| 01:28 PM | emma1991: | does any body here so A level chemistry or has done it recently?? |
| 01:28 PM | emma1991: | does any body here so A level chemistry or has done it recently?? |
| 01:28 PM | emma1991: | does any body here so A level chemistry or has done it recently?? |
| 01:27 PM | emma1991: | does any body here so A level chemistry or has done it recently?? |
| 01:27 PM | emma1991: | does any body here so A level chemistry or has done it recently?? |
| 01:27 PM | emma1991: | |
| 08:41 PM | texasguy: | hello |
| 08:41 PM | texasguy: | hello |
| 09:21 PM | Spitze: | http://www.chatzy.com/365581508899 <--- A better chat room if you're still looking for help |
| 08:57 PM | alison: | because the electrons are not accessible |
| 08:56 PM | alison: | means it has more directionality, aka electrons stick out farther. this is why less p character means a weaker base |
| 08:44 PM | angel2: | hey what does "more p character mean" again |
| 08:42 PM | Anne Edelstein: | oh, right, thanks |
| 08:42 PM | Das ist lächerlich: | When you get an alkyl shift in carbocation rearrangement and it makes a bigger/smaller ring |
| 08:41 PM | Anne Edelstein: | what do you mean by that??? like R/S stuff on rings?? |
| 08:40 PM | Das ist lächerlich: | I'd bet** |
| 08:40 PM | Das ist lächerlich: | I think no ring rearrangements might have just been on that first test. I'd be that they're fair game now... |
| 08:39 PM | Das ist lächerlich: | http://www.chatzy.com/365581508899 <---- More stable chat room that doesn't flash every 2 seconds |
| 08:39 PM | shell21: | wishful thinking. |
| 08:39 PM | shell21: | I thought she mentioned that she woujldn't give us something like that/.... |
| 08:39 PM | shell21: | aw3esome. |
| 08:38 PM | angel2: | i think so |
| 08:38 PM | shell21: | are we responsible for ring rearrangements? |
| 08:37 PM | Das ist lächerlich: | Yeah... It's like an Sn2 |
| 08:36 PM | angel2: | hmm |
| 08:36 PM | Anne Edelstein: | oh schnikes that confuses me too |
| 08:36 PM | angel2: | ? |
| 08:36 PM | angel2: | because apparently it's an sn2 |
| 08:36 PM | angel2: | but it doesnt |
| 08:36 PM | Anne Edelstein: | shouldnt it attack at the more substituated carbon?? |
| 08:35 PM | Das ist lächerlich: | http://www.chatzy.com/365581508899 |
| 08:35 PM | Das ist lächerlich: | Hey you guys... This chat room sucks because it keeps kicking people out... Go to this link and I think we can use a better one: |
| 08:35 PM | angel2: | sorry och3 base |
| 08:35 PM | angel2: | where did that base attack? |
| 08:35 PM | angel2: | with the epoxide and the base naoch3? |
| 08:35 PM | angel2: | yesterday |
| 08:35 PM | angel2: | hey do you guys remember that last question we did |
| 08:34 PM | prarthana1: | so did we solve the ether problem someone just asked? |
| 08:34 PM | prarthana1: | oh okcool |
| 08:34 PM | prarthana1: | oh ok |
| 08:34 PM | angel2: | yeah |
| 08:34 PM | angel2: | we dont |
| 08:34 PM | Anne Edelstein: | yea dr. nerz said we dont have to do that one |
| 08:34 PM | Das ist lächerlich: | Yeah... I'm not sure if we have to know how to do that one... I think AIBN makes radicals, though |
| 08:33 PM | Anne Edelstein: | wait, let me just check really quickly |
| 08:33 PM | Anne Edelstein: | we dont have to know how to do that one i dont think |
| 08:32 PM | prarthana1: | 3rd down on the left |
| 08:32 PM | Das ist lächerlich: | I keep getting kicked out of this chat room... Anyone want to try a different one? http://www.chatzy.com/365581508899 |
| 08:32 PM | prarthana1: | page 4 of the rxn flashcards |
| 08:31 PM | Das ist lächerlich: | Pg 4 of what? Which column and problem? |
| 08:31 PM | Anne Edelstein: | are the jeopardy answers online, elle? |
| 08:31 PM | prarthana1: | yesi am looking at page 4 |
| 08:30 PM | prarthana1: | yes |
| 08:30 PM | Das ist lächerlich: | Prar: Are you looking at a specific problem? |
| 08:30 PM | elle: | on page 2 of jeopardy, in the reductions column, 300, is that no rxn? |
| 08:29 PM | lightfoot: | it becomes an R-Cl group |
| 08:29 PM | elle: | it would attack the H from the HI, then it has too many bonds and is postively charged |
| 08:29 PM | prarthana: | butane, that is. |
| 08:28 PM | prarthana: | ok, but then how does the butane react with that? there is no + or - part on that molecule |
| 08:28 PM | Anne Edelstein: | making SO2 gas and a chloride ion |
| 08:28 PM | Das ist lächerlich: | You could protonate it or something |
| 08:28 PM | Das ist lächerlich: | To break an ether you'd have to turn it into a good leaving grou |
| 08:28 PM | Anne Edelstein: | bc you have a negative charge on the oxygen with a single bond, it folds in and creates another double bonded o and kicks the cl off |
| 08:27 PM | angelo: | only if it's in an aq. solution |
| 08:27 PM | angelo: | only if it's in an aq. solution |
| 08:27 PM | Anne Edelstein: | yea, thats the one where you have the leaving group as o=s-o (-)and a cl attached to the s also |
| 08:27 PM | hellolo: | How does one break an ether (on flashcards page 6)? |
| 08:27 PM | lightfoot: | it's butane and not butanol? |
| 08:26 PM | lightfoot: | on the flashcards she doesn't put the aldehydes? |
| 08:26 PM | prarthana: | does anyone understand the flashcard rxn with the butane and So2Cl2? |
| 08:25 PM | lightfoot: | on primary alcohols are we suppose to assume the acid is the major? |
| 08:25 PM | Anne Edelstein: | Hey guys, question, if you have two compounds and they are diasteriomeric in relation to eachother but one compd is a meso group do they lose any rela |
| 08:23 PM | Das spitze: | Could be an aldehyde, or it could've been the second one and you'd have a carboxylic acid |
| 08:23 PM | Das spitze: | So you'll get some sort of carbonyl--not necessarily a ketone |
| 08:23 PM | Das spitze: | Yeah, then a base could come take a beta-H and you're set |
| 08:21 PM | lightfoot: | and then you get a ketone? |
| 08:20 PM | Das spitze: | Does that make sense? |
| 08:19 PM | angel: | will deprotonate it? |
| 08:19 PM | angel: | ? |
| 08:18 PM | angel: | which oh |
| 08:18 PM | Spitze: | Then you have to get rid of the extra H that's stuck on there, then you've got your good leaving group |
| 08:18 PM | Spitze: | Then the alcohol that you have will attack the Cr, just like we did in those other ones, and it'll make the chromium ester |
| 08:18 PM | Spitze: | So, the H2Cr04 is an acid, so one of it's -OHs will deprotonate because it's in an aqueous solution |
| 08:17 PM | Spitze: | If you've got a specific problem, let me try to look at it... My gut is that it'll make a Chromium ester thing |
| 08:16 PM | Spitze: | Like, mechanistically? |
| 08:15 PM | Hello?: | how the hell does the h2cro4 reactgion work?how bout this |
| 08:14 PM | Hello?: | alright well how bout this |
| 08:14 PM | Spitze: | Since we're all in here, I'll just say that I'm willing to answer any questions that I can |
| 08:11 PM | Spitze: | I don't even really know if she's coming |
| 08:10 PM | Spitze: | Not yet |
| 08:10 PM | Hello?: | is she there? |
| 08:07 PM | Spitze: | The star! |
| 08:02 PM | Student: | Dr. Nerz? |
| 09:10 PM | Hi Dr Nerz: | I have a question about oxidizing agents |
| 09:04 PM | your welcome: | your welcome |
| 08:55 PM | David F: | oh ok, thanks Dr. Nerz |
| 08:54 PM | nerz: | it is described in the tables - the salmon tables |
| 08:54 PM | nerz: | there is a peak in the finger print region that indicates the compound is a trans alkene. There is another peak that shows it is a monosubstituted al |
| 08:52 PM | nerz: | termination steps are not desirable - the product can form from it |
| 08:52 PM | David F: | the lab just confused me a little |
| 08:52 PM | David F: | oh ok, that's what i thought |
| 08:51 PM | nerz: | the last step in a propagation is the formation of the product and the original radical |
| 08:51 PM | David F: | what should we have been looking for? |
| 08:51 PM | nerz: | so in a free radical reaction there are propagation steps which are teh real reaction |
| 08:50 PM | David F: | i thought I saw a trans peak on both |
| 08:50 PM | David F: | i had trouble distinguishing between the trans and 1-nonene compound on the IR on the last test |
| 08:50 PM | David F: | well my last question was about IR's |
| 08:49 PM | David F: | hm, ok... |
| 08:49 PM | nerz: | termination is just the combination of two radicals - any two radicals |
| 08:48 PM | David F: | so what was wanted for the termination step? |
| 08:48 PM | nerz: | you should have a stable molecule and a free rad - the original free rad |
| 08:46 PM | nerz: | that is the end of a free radical reaction |
| 08:44 PM | David F: | i ended with the dichlorobutane and chlorine radical. where does it go from there? |
| 08:43 PM | David F: | i didn't know that we needed to include that step, and i'm not entirely sure what it is |
| 08:43 PM | David F: | ok thanks! my second question was about the termination step for the chlorine radical reaction for lab |
| 08:42 PM | nerz: | yes |
| 08:42 PM | David F: | and an aprotic will only stabilize the cation? |
| 08:41 PM | nerz: | yes, the leaving group anion needs stabilization too |
| 08:41 PM | nerz: | sn1/e1 the leaving group leaves and normally makes an anion and cation. The stabilization of both accelerates the reaction |
| 08:41 PM | David F: | oh, you mean the leaving group anion? |
| 08:40 PM | David F: | but i thought the fact that they don't solvate anions would be an acelerating factor, like an sn2/e2? |
| 08:40 PM | nerz: | they will not solvate anions well so they are not the best for sn1 |
| 08:36 PM | David F: | and do polar aprotic have any effect on sn1/e1? |
| 08:36 PM | nerz: | yes, they do for that reason |
| 08:35 PM | nerz: | what did your email say. I just got home from my office |
| 08:34 PM | David F: | my first was: do polar protic solvents decelerate sn2/e2 because they surround the anion? |
| 08:33 PM | David F: | i just had a few questions |
| 08:32 PM | nerz: | what did your email say. I just got home from my office |
| 08:32 PM | David F: | I realize that you may not have had time based on your email, so I thought I'd come here |
| 08:31 PM | David F: | Hi Dr. Nerz, did you get my email by any chance? |
| 08:22 PM | nerz: | i am here |
| 08:20 PM | David F: | Dr. Nerz? |