the present method offers advantages over the prior art which teaches reacting an esterified mercaptoalcohol with an organotin halide oxide or organostannoic acid compounds wherein r 39 is n heptyl are unique in that they do not exhibit the disagreeable odor that characterizes this class of compounds application_number US 92651678 A description the first step of the present method for preparing the present monoorganotin derivatives of mercaptoalcohol esters comprises reacting the corresponding monoorganotin trihalide of the formula rsnx 3 with an aqueous solution containing a stoichiometric amount of a base all of the base can be added initially to react with the organotin halide alternatively a major portion of base usually about 90 of the total is added initially and the remainder is added following addition of the alkali metal sulfide as disclosed in the preceding specification the term x in the foregoing formulae represents chlorine bromine or iodine and r represents an alkyl group containing from 1 to 20 carbon atoms a cycloalkyl aryl alkaryl or an aralkyl group when r is alkyl it can be methyl ethyl n propyl iso propyl or any higher homolog containing up to 20 carbon atoms suitable cycloalkyl radicals include for example cyclopropyl cyclobutyl cyclohexyl and cyclooctyl when r is aryl it is preferably phenyl but r may also represent naphthyl anthrecenyl or biphenyl suitable aralkyl radicals include for example benzyl and.