Ciba-geigy Corporation

Hermann W Wehner

Hermann O Wirth

Jozef Drabek

Rudolf Maul

Joachim Lorenz

Eberhard Otto

Hans Wolf Jung

The direct reaction of metallic tin with an .alpha.,.beta.-unsaturated nitrile, hydrogen chloride, hydrogen bromide or hydrogen iodide in the presence of an alcohol yields diorgano-tin dihalides with an iminoester function in the organo groups. This iminoester function can be converted with mercaptans into the corresponding iminothioester function. The novel diorgano-tin dihalides of the formula ##STR1## wherein X represents a chlorine, bromine or iodine atom,

Process for the production of organo-tin compounds

Diorgano-tin dihalides containing functional groups in the organo groups are obtained in simple manner by the direct reaction of metallic tin with hydrogen chloride, hydrogen bromide or hydrogen iodide and an unsaturated nitrile, in the presence of water, water and alcohol, a carboxylic acid and/or alcohol.

The direct reaction of metallic tin with an .alpha., .beta.-unsaturated nitrile, hydrogen chloride, hydrogen bromide or hydrogen iodide in the presence of an alcohol yields diorgano-tin dihalides with an iminoester function in the organo groups. This iminoester function can be converted with mercaptans into the corresponding iminothioester function. The novel diorgano-tin dihalides of the formula ##STR1## wherein X represents a chlorine, bromine or iodine atom,

Organo-tin compounds

Compounds of the general formula I ##STR1## wherein M IS 4, 6 OR 8,

Triorganotin cyanometallate compounds

The invention relates to a method of combating insect pests in plant cultures employing dimethyltin-diacetate.

Method of combating insect pests in plant cultures employing

A process is described for the production of organotin halides from metallic tin and organic halides and in the presence of catalysts in sulphones as the reaction medium, whereby there are obtained, in addition to high yields, also high reaction rates.

Growing community of inventors

Zwingenberg, Germany

Hermann W Wehner