Montedison S.p.a.

Nicola Troiani

Franco Gozzo

Simone Lorusso

Paolo Piccardi

Romano Santi

A process for preparing 1,1-dihalo-1,2,2,2-tetrafluoroethanes by isomerization of 1,2-dihalotetrafluoroethanes at their reflux temperature, by using, as a catalyst, the reaction product prepared 'in situ' from an anhydrous aluminum halide with at least equimolecular amounts of the isomer, 1,1-dihalo-1,2,2,2-tetrafluoroethane in a medium consisting of 1,2-dihalotetrafluoroethane. The products find application as intermediates for pyrethroid insecticides.

Process for preparing 1,1-dihalo-1,2,2,2-tetrafluoroethanes

There are disclosed arylhydrazo-aldoximes which, as such, as tautomers, and in the form of organic or inorganic salts thereof, are active in preventing and treating infections of useful plants by fungi, and in immunizing plants against such infections.

Method of protecting useful plants and formulations for use in said

There are disclosed new fungicidally active N-substituted ethylendiamino-dithiocarbamates, in particular such dithiocarbamates which are active against Plasmopara viticola infections (B. et C.) Berl. et de Toni (Peronoapora of the vine) and against infections by other fungi that are noxious to useful agricultural cultivations. An important characteristic of the new fungicidally active dithiocarbamates of the invention is that use thereof does not result in the formation of ethylenthiourea.

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Milan, Italy

Nicola Troiani