Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!philabs!cmcl2!floyd!vax135!ariel!houti!hogpc!houxm!ihnp4!ixn5c!inuxc!pur-ee!uiucdcs!adams From: adams@uiucdcs.UUCP Newsgroups: net.physics Subject: Re: Dioxin molecular structure? - (nf) Message-ID: <2365@uiucdcs.UUCP> Date: Thu, 7-Jul-83 23:28:00 EDT Article-I.D.: uiucdcs.2365 Posted: Thu Jul 7 23:28:00 1983 Date-Received: Sat, 9-Jul-83 18:39:24 EDT Lines: 42 #R:ihlts:-15900:uiucdcs:24400032:000:1828 uiucdcs!adams Jul 7 09:15:00 1983 The following is quoted (w/o permission) from the July 6 NY Times, which in turn got it (presumably with permission) from Chemical & Engineering News, June 6, 1983. Does the first sentence imply that there are lots of flavors of dioxin? Rob Adams (217) 333 3536 {ihnp4,pur-ee}!uiucdcs!adams =-=-=-=-=-=-=-= "One Way Dioxn is Formed" The compound known as 2,3,7,8 TCDD, apparently the most toxic of the 75 possible chlorinated dioxins, can result from a two-part reaction in the manufacture of TCP, a comman chemical intermediate in the manufacture of herbicides. (Diagrams are not intended to show actual shape of molecules or location of paticular atoms.) A molecule of 2,3,7,8 TCDD ------------------------------------ consists of two benzene rings, each |Cl C O C Cl | with six carbon atoms, bound together | \ / \\ / \ / \\ / | together by two oxygen atoms. Two | C C C C | chlorine atoms are attached to each | || | || | | ring. | C C C C | | / \ // \ / \ // \ | |Cl C O C Cl | ------------------------------------ (From here on out, I am \not/ going to try to represent the pics, buy the Times to see what it looks like. R) In a reaction of two TCP molecules, each of which has hree chlorine atoms, one oxygen atom and, as shown here, an atom of soduim, under the influences of temperature and pressure, a molecule of sodium chloride is lost. Almost immediately, the resultant combination then loses one more molecule of sodium chloride. . . . . .leaving a molecule of 2,3,7,8 TCDD.