The present invention relates to new compositions and methods for the regulation of plant growth, especially for fruit abscission, acceleration of ripening and latex discharge and to new active substances of the class of .beta.-halogenoethyl-silanes. The active substances in the new compositions respond to the formula ##STR1## wherein X is chlorine or bromine, Y represents chlorine or the radical --OR.sub.3, each of the radicals R.sub.1, R.sub.2 and R.sub.3 independently represent substituted or unsubstituted alkyl radicals, alkenyl, halogenalkenyl, alkynyl and cycloalkyl radicals, substituted or unsubstituted phenyl and benzyl radicals; one or more of the symbols R.sub.1, R.sub.2 and R.sub.3 can also represent the group --COR.sub.4, wherein R.sub.4 stands for an unsubstituted or substituted alkyl or alkenyl radical, a possible phenyl substituent may itself be substituted or not, for an alkynyl, alkoxyalkyl, alkoxycarbonylalkyl, or phenyl radical optionally substituted or for a heterocyclic radical; R.sub.1 and R.sub.2, also with the signification of --CO-R.sub.4, together with the adjacent atoms, can also form a silicium-containing saturated or unsaturated heterocyclic ring system. The .beta.-bromoethyl-silanes and the .beta.-chloroethylsilanes of the above formula wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 do not represent unsubstituted alkyl radicals with less than 6 carbon atoms, are new compounds.
本发明涉及新的组合物和方法,用于调节植物生长,特别是用于果实脱落、加速成熟和乳液排出,并涉及新的β-卤代乙基
硅烷类活性物质。新组合物中的活性物质响应于以下公式:其中X为
氯或
溴,Y表示
氯或基团-OR3,每个基团R1、R2和R3独立地表示取代或未取代的烷基基团、烯基、卤代烯基、炔基和环烷基基团、取代或未取代的苯基和苄基基团;其中一个或多个符号R1、R2和R3也可以表示羧基R4,其中R4代表未取代或取代的烷基或烯基基团,可能的苯基取代基本身可以是取代或未取代的炔基、烷氧基烷基、烷氧羰基烷基或苯基基团,也可以是一个杂环基团;R1和R2,也可以表示--CO-R4,与相邻的原子一起,还可以形成含
硅饱和或不饱和杂环环系统。上述公式中R1、R2、R3和R4不表示碳数少于6的未取代烷基基团的β-
溴代乙基
硅烷和β-
氯代乙基
硅烷是新的化合物。