Two new efficient oxidants 1, 2-ethane diylbis (triphenylphosphonium) diperchlorate (I), 1, 2 ethanediylbis (triphenylphosphonium) dichlorate (II) were prepared and used for oxidation of different benzylic alcohols to afford their corresponding carbonyl compounds. These new ionic liquids have been characterized by IR, NMR spectroscopies and single crystal X-ray analysis. These compounds have advantages over similar oxidizing agents[1], [2] such as short reaction time, high yields of the oxidized species, nontoxicity and stability of the reagent. The crystal structure and hirshfeld surface analysis of titled compounds revealed that the change of accompanying anionic moiety can affect the directional interactions of CH...O hydrogen bonds between anionic and cationic nits which lead to various supramolecular aggregation on the crystal packing. In order to exploring the influence of crystal environment of anionic moieties on the geometry of main cationic unit, the relative contribution of various close contacts and 2D fingerprint plots of title compounds and fourteen analogous structures retrieved from Cambridge Structural Database (CSD) were investigated as well as the distortion of tetrahedral coordination geometry of P center of main cationic unit based on Ʈ 4parameter.

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