The preparation of seven new 8-diketones containing fluorinated groups is reported. The infrared spectra and enolic Acetylacetone and l,l,l-trifluoro-2,4-pentanedione were content of these @-diketones were determined and are noted.2 chlorinated and the products identified.The metallic cation plays an important role in the aldol type condensation of metallo acetic esters with acetophenone to form @-hydroxy esters, since the reaction may be realized satisfactorily with lithio, zinchalo and magnesiumhalo esters but not with sodio esters. The aldol condensation was realized with a sodio ester under special conditions but, under usual conditions, metal-hydrogen exchange between the sodio ester and the a-hydrogen of the ketone occurred to form a B-diketone.Moreover, sodio 8-hydroxy esters were found to be relatively unstable; they underwent the reverse aldol condensation even in refluxing ether. The reverse aldol condensation was realized also with lithio-and zinchalo-8-hydroxy esters, but much more drastic conditions were required. The success of the aldol condensation of lithio, zinchalo and magnesiumhalo esters with acetophenone is ascribed to the coordinating capacities of the metallic cations.

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Three distinct methods of preparation of 1, l-di-//-perfluoroalkyl halides have been developed in this laboratory. We wish to report a brief account of two of these methods along with the chemistry of some of the intermediates. The third method has been published (1).The first 1, l-di-JT-heptafluorobutyl halide ever prepared was 1,1-di-JTheptafiuorobutyl iodide. 1, l-Di-H-heptafiuorobutyl amine, C3F7CH2NH2, was reacted with nitrous acid in aqueous solution to give 1-17-hep tafiuorodiazobutane, C3F7CHN2, which was isolated by distillation in one run. Treatment of 1-7/heptafluorodiazobutane with an excess of hydrogen iodide in 3, d'-dichlorodiethyi ether at room temperature gave 1, l-di-H-heptafluorobutyl iodide, C3F7CH2L No reaction occurred at Dry Ice temperature, -78°.

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The action of elemental fluorine upon the complex polyheterocycle, melon, yields products which contain 50% or more of fluorine and are solids or liquids of very low volatility. The structure assigned indicates essential retention of the tri‐s‐triazine structure, with addition of fluorine to most of the double bonds, replacement of hydrogen by fluorine, and a minor amount of cleavage of carbon‐nitrogen bonds.