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CHM310H1 (26)
Jon Abott (19)
Lecture

March 28th.docx

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Department
Chemistry
Course
CHM310H1
Professor
Jon Abott
Semester
Winter

Description
th March 28 1. organic compunds: last week: formation of dioxins. When you are generating these defoliants you end up forming dioxins. When yo are forming T4DD and T5DD you can end up forming dioxins. Reason for accidents. 2. There are other ways they can be generated: a. Temporaphenol? – (image one) often put into wood. Kills mold. if you burn wood you can see the structure and how it might end up with dioxin. This Is why it is not used anymore. b. Paper industry: ligning is highly aromatic and the way wood is bleached is through Cl2 gas, and ends up chlorinating lots of compounds,and this is not used as a bleaching agent anymore. CL2o is used now. c. _ end of herbicides and pesticides – 3. 4. PCB – are chemicals that was baned in 1977 in Namerica. Had some degree of chlorination in it. See the image above. Not acutely toxic. Was good electric insulators, was used in industrially. Log kow depends on the amount of chlorine in rings: 4.5  8.2. chlorinated biphenyl is 8.2.? 5. More chlorines heavier the compounds, the lighter ones slowly volatizes from the lake. 6. When they are heated in the presence of Q they transform themselves. One f the byproducts will be the compound in the image. Furans. Example of polychlorinated dibenzofurans. / PCDFs. 7. Many of them are not used anymore. 8. 9. Stockhalm convention addresses POP’s : persistent Organic Pollutants. A whole bunch of organic products are addressed in this convetion 10. They all have a few common factors: a. They resist degradation. : largely related fact for chlorine compounds b. Persist in the envronemnt: c. Have to bioaccumulate and biomagnify. d. Inential impacts on human health. Which are largely developmental or neurological. e. PCB, DDT are pesticides. Stockhalm convention was signed in 2004? 2001. f. These compounds which fit into this category is: i. Low water solubility: so they don’t wash away relate to their persistence in the environment ii. Semi volatile : if they are too involatile they don’t bioaccumulate. They have to have some degree of volatility too iii. Chmorinated: almost entirely chlorinatesd iv. Little soluilty in water. v. Montreal protocol removed use of CFC. vi. The one that is more realistc is the Kyoto convention? 11. Two more classes of compunds: a. i. Enterpreunal destructers and estradiol release? ii. The compound is a good example. Image above. iii. This mimics some problems: if oyu put up destructer estradiol you can look at the structure you can think that the iv. There are reproductive effects relaresd with this compunds, can affect hormones. Endorphin destructers and estrogens you can have extremely low levels and still have effects. v. You can see some of them effects in chlorins compunds as well. Much of the time is taken to change the environmental impact of these compunds. vi. For EDT you can do the same thing. The active site is the tetrahedral C in the
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