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masterofpuppets
(Hive Bee) 02-27-02 00:34 No 274147 |
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Which isomer?? | Bookmark | |||||
How does one work out what isomer will be form (d or l or both) from a given reaction?? MOP knows that l-pseudo goes to d-meth via the RPIE reaction - is the naming of the l and d arbitary or do things change around during the reaction? I wouldn't do that if I were you..... |
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foxy2 (Distinctive Doe) 02-27-02 01:06 No 274157 |
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Re: Which isomer?? | Bookmark | |||||
MOP knows that l-pseudo goes to d-meth via the RPIE reaction - is the naming of the l and d arbitary or do things change around during the reaction? Its not arbitrary, the chrial carbon which the "l-" in l-pseudo refers to is the one that has the -OH group, remove the -OH group and this carbon is no longer chrial. The "d-" in d-meth refers to the carbon that has the nitrogen attached, this carbon is unaffected in the reaction and its orientation is "d-" in pseudoephedrine, ephedrine and d-methamphetamine. I am unsure if my nomenclature is correct but thats why Learn more at these sites http://ep.llnl.gov/msds/orgchem/stereoch Speak Up(Action Alerts!) (http://www.drcnet.org/) |
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Vlad (Newbee) 02-27-02 04:19 No 274246 |
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Re: Which isomer?? | Bookmark | |||||
To put it simply: For whatever reason, pseudo doesn't switch. d-pseudo produces d-meth. l-pseudo is very uncommon. Also, it is more expenisive than d-pseudo. Ephedrine switches though; l-eph makes d-meth and d-eph makes l-meth. |
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