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Studies on phosphorus oxychloride and aluminium chloride complex

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Summary

1. Anhydrous aluminium chloride reacts with phosphorus oxychloride to give a complex with a composition AlCl3.2 POCl3 which can be prepared in the form of a free flowing powder.

2. The phosphorus oxychloride-aluminium chloride complex in nitrobenzene dissociates into AlCl3.POCl3 and POCl3 as indicated by the cryoscopic measurements.

3. The solution of the complex in nitrobenzene has a higher specific conductivity than the corresponding electrical conductivities of individual components. Similar higher electrical conductance is observed when the two components are mixed in nitrobenzene in different proportions.

4.When a solution of anhydrous aluminium chloride in nitrobenzene is titrated conductometrically against a solution of phosphorus oxychloride in nitrobenzene, a limiting value in the conductivity is reached at point corresponding to the molecular composition, the components in the ratio of 1:2 AlCl3: POCl3 in solution.

5. The absorption maxima of the complex in nitrobenzene solution differ from the absorption maximum of the individual components.

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Authors and Affiliations

  1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-12

    K. N. Venkataraman & A. R. Vasudeva Murthy

Authors
  1. K. N. Venkataraman
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  2. A. R. Vasudeva Murthy
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Additional information

Communicated by Dr. M. R. A. Rao,f.a.sc.

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Venkataraman, K.N., Vasudeva Murthy, A.R. Studies on phosphorus oxychloride and aluminium chloride complex. Proc. Indian Acad. Sci. 51, 270–279 (1960). https://doi.org/10.1007/BF03045749

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