Geometrical Model for Phenylthallium Dihalides |
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| Authors: | B P Asthana C M Pathak |
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| Institution: | 1. Laser and Spectroscopy Laboratory Department of Physics , Banaras Hindu University , Varanasi, 221005, INDIA;2. Alexander-von-Humboldt Fellow, Experimentalphysik-I , Physikalisches Institut, Universit?t Bayreuth , D-8580, Bayreuth, West Germany;3. Laser and Spectroscopy Laboratory Department of Physics , Banaras Hindu University , Varanasi, 221005, INDIA |
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| Abstract: | The geometry of the phenylthallium dihalides, PhTlX2(X=F, Cl or Br) which has heitherto been unknown, has been proposed on the basis of several qualitative aspects and quantitative arguments. These molecules have a planar structure with C2v symmetry and the ring geometry has been assumed to be the same as that of benzene. The ring-substituent bond length has been taken to be 2.218 A° in all the three molecules, and the Tl-F, Tl-Cl and Tl-Br bond lengths in respective molecules have been estimated to be 1.878, 2.366 and 2.520 A°. The remaining parameter inter-bond angle, F-Tl-F has been taken to be 116° in PhTlF2, whereas, angles Cl-Tl-Cl and Br-Tl-Br in respective molecules have been taken to be 120°, as expected in the case of a pure sp2 hybridization. |
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