Commercial Application of Organotin Compounds

Commercial and legal considerations lead to publication of compositions and formulations with sometimes vague chemical characterization. Table 269 summarizes such publications containing a paucity of data on which a precise identification of the organotin entity can be based. The formulae given in the first column of the table frequently indicate only the general character of a product or give components of preparations. 

Activity as stabilizer of defined organotin compounds have been given previously under the heading use at each separate compound and may be read in Chapters 1 through 7. 

Bu2Sn(02CR)02CR (a) Thioether and maleate halfester 1208 

Y = 2-bicycloheptene 9,10-epoxy stearate Octyl 9 10-epoxy stearate Maleic acid halfester R = thiol acid and alkyl R = aryl and alkyl epoxide 

I = Me, PhCHa, Bu, CqI thioether carboxylate rin detn. by combustior Detn. in PVC by paper c chem. methods 

---

Reactions 19.65 19.67 illustrate synthetic approaches to ILtSn compounds, and organotin halides can be prepared by routes equivalent to reactions 19.39 and 19.48, redistribution reactions from anhydrous SnCLi (equation 19.68), or from Sn(II) halides (equation 19.69). Using R4Sn in excess in reaction 19.68 gives a route to R3SnCl. Reaction 19.66 is used industrially for the preparation of tetrabutyltin and tetraoctyltin. Commercial applications of organotin compounds are highlighted in Box 19.4. 

---