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Natural Science Forum / Chemistry / Organic Synthesis / July 2003what is freon made of , any idea?
thank you  SignaturePaul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA > thank you Which Freon? It is a generic term. Freons in general are chlorofluorocarbons. SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) "Quis custodiet ipsos custodes?" The Net! -- Paul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA > thank you Uh???????????????? Which one? It's not a mixture it's a chemical thus.... (IIRC) Freon RXYZ X = carbons-1 Y=hydrogens+1 Z=chlorines (unless there a suffix B, where they are bromines) everything else is fluorine Thus Freon R22 is x = 0 thus C=1 y = 2 thus H=1 z = 2 thus Cl =2 makes dichlorodifluoromethane Freon R13B = bromotrifluoromethane (a real ozone killer) Freon R134 = tetrachloroethane SignatureRon Jones Don't repeat history, see unreported near misses in chemical lab/plant at http://www.crhf.org.uk . -- Paul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA Ron wrote: > Tao Zhu wrote: > > thank you > Uh???????????????? > Which one? [quoted text clipped - 4 lines] > Z=chlorines (unless there a suffix B, where they are bromines) > everything else is fluorine > Thus Freon R22 is > x = 0 thus C=1 > y = 2 thus H=1 > z = 2 thus Cl =2 > makes dichlorodifluoromethane -Following a good logic formalism it should be Freon R022 otherwise you may say x=2, y=2 and/or z=2... > Freon R13B = bromotrifluoromethane (a real ozone killer) -Again Freon R013B would be more convenient! Also following your explanation it should be x=0--> 1 carbon y=1--> 0 hydrogen z= bromine = 3 the rest is F ===> CFBr3 ---> tribromofluoromethane and not trifluorobromomethane > Freon R134 = tetrachloroethane -Correct... strangely this freon doesn't contain fluorine :-? PH Z [Part 2, Text/HTML 35 lines] [Unable to print this part] SignaturePaul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA LOUIS wrote: > Ron wrote: >> Tao Zhu wrote: >>> thank you > [quoted text clipped - 6 lines] >> Z=chlorines (unless there a suffix B, where they are bromines) >> everything else is fluorine >> Thus Freon R22 is >> x = 0 thus C=1 >> y = 2 thus H=1 >> z = 2 thus Cl =2 >> makes dichlorodifluoromethane > -Following a good logic formalism it should be Freon R022 otherwise > you may say > x=2, y=2 and/or z=2... >> Freon R13B = bromotrifluoromethane (a real ozone killer) > -Again Freon R013B would be more convenient! > Also following your explanation it should be [quoted text clipped - 3 lines] > the rest is F ===> CFBr3 ---> tribromofluoromethane and not > trifluorobromomethane >> Freon R134 = tetrachloroethane > -Correct... strangely this freon doesn't contain fluorine :-? > PH Z I didn't invent the silly system. What you see is what some bright spark invented. If it's a 2 digits you have to assume there is an implicit '0' (i.e one carbon) Ooops! can't even use the sytem properly, yes you are right - "tribromofluoromethane and not trifluorobromomethane" - great refrigerant (just got rid of a cryostat that used this - was removed before we dumped it), great ozone killer - someone told me the UK Ministry of Defence were stockpilling this one - their equipment uses it, and as it's not made any more, they bought up all the stocks.... SignatureRon Jones Don't repeat history, see unreported near misses in chemical lab/plant at http://www.crhf.org.uk . -- Paul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA |
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