{"id":2651,"date":"2007-01-11T00:00:00","date_gmt":"2007-01-10T23:00:00","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T22:00:00","slug":"2651","status":"publish","type":"post","link":"https:\/\/www.vialattea.net\/content\/2651\/","title":{"rendered":"Io vorrei sapere la reazione chimica completa che porta alla formazione de DDT? E’ possibile averla? Mi servirebbe per gli esami di stato e non riesco a trovarla da nessuna parte….Grazie mille ciao ciao"},"content":{"rendered":"

Riportiamo innanzitutto alcuni dettagli di interesse chimico sul DDT (dicloro-difenil-tricloroetano) CASRN: 50-29-3
<\/strong>Molecular Formula:<\/strong>\u00a0 C14-H9-Cl5 ([The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 409
Molecular Weight:<\/strong> 354.49
Boiling point:<\/strong> 260\u00b0C<\/p>\n

\"\"<\/p>\n

Struttura molecolare del DDT (Tratta da www.wikipedia.org<\/a>)<\/p>\n

Density\/Specific Gravity:<\/strong> 0.98 to 0.99
[Clayton, G.D., F.E. Clayton (eds.) Patty\u2019s Industrial Hygiene and Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New York, NY: John Wiley & Sons Inc., 1993-1994., p. 1508]**PEER REVIEWED**
Octanol\/Water Partition Coefficient:<\/strong>
log Kow = 6.91\u00a0 [Hansch, C., Leo, A., D. Hoekman. Exploring QSAR – Hydrophobic, Electronic, and Steric Constants. Washington, DC: American Chemical Society., 1995., p. 118]**PEER REVIEWED** <\/p>\n

Spectral Properties:<\/strong>
Max absorption (95% alcohol): 236 nm
[Budavari, S. (ed.). The Merck Index – An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 481]**PEER REVIEWED**
IR: 15542 (Sadtler Research Laboratories Prism Collection)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
UV: 4655 (Sadtler Research Laboratories Spectral Collection)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
NMR: 620 (Varian Associates NMR Spectra Catalogue)
[Weast, R.C. and M.J. Astle. CRC Handbook of Data on Organic Compounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985., p. V1 601]**PEER REVIEWED**
Intensity of mass spectral peaks: 246 M\/z (100%); 318 M\/z (79%); 248 M\/z (66%); 316 M\/z (61%)
[Hites, R.A. Handbook of Mass Spectra of Environmental Contaminants. Boca Raton, FL: CRC Press Inc., 1985., p. 105]**PEER REVIEWED** <\/p>\n

Vapor Pressure:
<\/strong>1.6X10-7 mm Hg @ 20 deg C\u00a0 [Bidleman TF, Foreman WT; Adv Chem Ser 216:27-56 (1987)]**PEER REVIEWED** <\/p>\n

Alcune interessanti informazioni storiche<\/strong> si possono torvare al link di seguito a cui rimando:<\/p>\n

http:\/\/www.anisn.it\/scuola\/strumenti\/licheni\/ddt.htm<\/a><\/p>\n

Per la fabbricazione: <\/strong><\/p>\n

Indichiamo di sseguito due riferimenti bilgiografici per la fabbricazione che possono essere rintracciati nelle biblioteca di chimica tramite il C.A.S. che sar\u00e0 sicuramente disponibile, sopratatutto si consiglia di consultare l’ottimo e sempre presente KIRK-Othmer.<\/p>\n

1) Chlorobenzene undergoes acid-catalyzed condensation with trichloroacetaldehyde to produce DDT.
[Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. 5(79) 800]**PEER REVIEWED** <\/p>\n

2)… P Muller, US patent 2,329,074 (1944 to Geigy). … large scale production.
[Budavari, S. (ed.). The Merck Index – An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 481]**PEER REVIEWED** <\/p>\n\n","protected":false},"excerpt":{"rendered":"

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