Polychlorinated Terphenyls (PCTs): Backbone Angle of ortho and nonortho Chlorination

Wibowo, Atmanto Heru and Gruenenberg, Joerg (2010) Polychlorinated Terphenyls (PCTs): Backbone Angle of ortho and nonortho Chlorination. Jurnal EKOSAINS, II (2). pp. 27-31.

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    Polychorinated Terphenyls is considered as one of persistent organic pollutants (POPs) and have been banned in the use mostly in United State and Europe countries. A study of the ortho chlorination toward backbone angle has been done in order to obtain the information of –C-C- angle of between aromatic groups of terphenyls. Five hexachlorinated terphenyl standards have been deployed for the purpose. Firstly, five terphenyl standards of 2,2",3,3",5,5"-hexachlorinated-meta-, 2',3,3",5,5',5"-hexachlorinated- para-, 2',3,3",4,4",5'-hexachlorinated-para-, 2,2”,3,3”,5,5”-hexachlorinaated-para-, 3,3´,3”,5,5´,5”-hexachlorinated-para- have been measured by GC-FTIR. From the data obtained, IR spectra of each standard were then compared to the theoretical calculation with Gaussian Program. The result showed that IR spectra of all five standard congeners were fit to the each spectra of the theoretical calculation. Based on the theoretical IR spectra obtained, furthermore, backbone angle of each five standards were able to be obtained related to the position of the chlorination pattern of the backbone. The angle between aromatics groups because of ortho chlorination or without ortho chlorination was clearly different. The ortho chlorination contributed to angle resulted in the lowest structure energy level around 51°-58°. Without ortho chlorination, the angle is around 36°.

    Item Type: Article
    Subjects: T Technology > TP Chemical technology
    Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam
    Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia
    Depositing User: Users 846 not found.
    Date Deposited: 09 Jul 2013 06:11
    Last Modified: 09 Jul 2013 06:11
    URI: https://eprints.uns.ac.id/id/eprint/1459

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