Abstract: 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,Y represents an oxygen or sulphur atom,R represents a hydrogen atom and/or alkyl, andR' represents a hydrocarbon group of aliphatic or aromatic character which can contain functional groups,are, for example, valuable intermediates for the production of PVC stabilisers.

Abstract: 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.

Abstract: 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,Y represents an oxygen or sulphur atom,R represents a hydrogen atom and/or alkyl, andR' represents a hydrocarbon group of aliphatic or aromatic character which can contain functional groups,Are, for example, valuable intermediates for the production of PVC stabilizers.

Abstract: Compounds of the general formula I ##STR1## wherein M IS 4, 6 OR 8,N is 0 or 1,A is 0 or 1,B is 1, 2, 3, 4 or 5,Each ofR.sub.1, r.sub.2 and R.sub.3 independently represents an alkyl group, an alkyl group which is substituted or which contains --CO-- or --C(.dbd.O)--O-- in the chain, an alkenyl, cycloalkyl, alkylcycloalkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group,L represents NH.sub.3, pyridine, water, CO, NO or a halogen atom, andM if m is 4, represents Ni(O), Ni(I), Ni(II), Pd(II), Pt(II), Cu(I), Cu(II), Ag(I), Au(III), Zn(II),Cd(II), Hg(II), and if m is 6 represents Ti(III), V(II), V(III), Cr(I), Cr(II), Cr(III), Mn(I), Mn(II), Mn(III), Te(I), Re(I), Re(II), Re(III), Re(IV), Fe(II), Fe(III), Ru(II), Ru(III), Os(II), Co(I), Co(II), Co(III), Rh(III), Ir(III), Pt(IV), and if m is 8, represents Ti(III), Mo(IV), Mo(I), W(IV), W(V), Mn(IV) or (Re(V), as biocides.