Dibutyltin-di

The molar enthalpy AH values for the reaction dimers 2(monomer) for dibutyltin di-i-propoxide and di-n-butoxide have been estimated. The degree of dissociation, a, is written in terms of the observed 1I9Sn chemical shift, <5 bs, and that of the dimer, <5 ,... 

SYNS DIBUTYLBIS((2-ETHYLHEXANOYL)OXY)-STANNANE DIBUTYLBIS((2-ETHYL-1-OXOHEXYL)OXY)-STANNANE (9CI) DIBUTYLTIN BIS(a-ETHYLHEXANOATE) DIBUTYLTIN BIS(2-ETHYLHEXANOATE) DIBUTYLTIN DI(2-ETHYLHEXANOATE) DI-n-BUTYLTIN DI-2-ETHYLHEXANOATE DIBUTYLTIN DI(2-ETHYLHEXOATE)... 

ETHYLHEXYLOXYCARBONYLMETHYLTHIO)DIBUTYL STANNANE BIS(2-ETHYLHEXYLTHIOGLYCOLATE)-DIBUTYLTIN DI-n-BUTYLTIN DI-2-ETHYLHEXYL-THIOGLYCOLATE DI-n-BUTYL-ZINN DI-2-AETHYLHEXYL THIOGLYKOLAT (GERMAN)... 

Organotin compounds are effective catalysts for the isocyanate-hydroxyl reaction. Tin catalysts have a slight odour, and low amounts are required to achieve a high reaction rate. Examples of organotin catalysts are stannous octoate, stannous oleate, dibutyltin dilaurate and dibutyltin di-2-ethylhexoate. They are often used in conjunction with small concentrations of antioxidants such as tertiary-butyl catechol resorcinol and tartaric acid. 

Figure 4.4.14 Dibutyltin di(carboranecarboxylate), dicarboranetin (2,6-pyridine dicarboxyl ate) and di-carboranetin di(5-oxopyrrolidine-2-carboxylate)...

It has been shown by Sutton et al that Vcsn couplings ( = 1-4) measured in isotopically enriched dibutyltin dichloride, dibutyltin di-iodide, tributyltin chloride, tributyltin iodide, diphenyltin dichloride, triphenyltin chloride and triphenyltin iodide are solvent dependent. 

Our attention turned next to a widely used type of commercial stabilizer, dibutyltin di-isooctylthioglycolate. The ligand exchange reaction in the dibutyltin di-isooctylthiogylcolate/dibutyltin dichloride system was studied by both JH and 18C NMR. In the experiments the resonance of the methylene group in the thioglycolate moiety (-S-CH2-COO-) was used to follow the reaction. When Compounds 7 and S (Table III, Experiments 6, 7, and 8) were mixed at 25°C in deutero-... 

Table III. 60-MHz H NMR Data for the Dibutyltin Di-isooctylthioglycolate/Dibutyltin Dichloride System...

Figure I. The 1H NMR spectra for the dibutyltin di-isooctylthioglycolate/di-butyltin dichloride system (Table III)...

Analyses of the -decoupled 13C NMR spectrum of the commercial sample of dibutyltin di-isooctylthioglycolate used in this study indicates that its thioglycolate precursor is produced from a mixture of C8 aliphatic alcohols and thioglycolic acid (HSCH2COOH). Consequently, the aliphatic portion of its 13C spectrum (0-60 ppm) is extremely complex. However, only one carbonyl carbon resonance is present (line width at half height = 4.7 Hz), and its chemical shift (173.9 ppm) is separated widely from those of the aliphatic carbons. The carbonyl group in these compounds apparently is not subject to the larger substituent effects well-documented for alkanes (II) and other classes of compounds. Thus, the carbonyl carbon resonance was used to monitor the reaction. 

Table V. Oven Aging Data and HCl-E volution Data for PVC Stabilized with Dibutyltin Di-isooctylthioglycolate/ Dibutyltin Dichloride...

Synonyms Dibutylbis (dodecylthio) stannane Di-n-butylbis (dodecylthio) tin Dibutyltin bis (n-dodecyl mercaptide) Dibutyltin di (dodecyl mercaptide) Stannane, dibutylbis (dodecylthio)-Empirical C32lH68S2Sn... 

Dibutyltin di-2-ethylhexoate n. (C4H9)2Sn (OOCC7Hi8)2- a white, waxy solid made by reacting dibutyltin oxide with... 

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