Dibutyl stannane

Dibutyl-stannan 281 Natriumhydrid/Eisen(III)-chlorid 279 aus Monoearbonsauren und Natrium-bis-[2 -m e thoxy-at hoxy]-di hydrido-aluminat, danach Sehwefelsaure 149 aus einem Natrium-earboxylat und Natrium-bis-[2-methoxy-athoxy]-dihydrido-aluminat 174... 

Sita and Babcock have also prepared high molecular weight poly(dibutyl-stannane) from dibutylstannane using Rh(H)(CO)(PPh3)3 as catalyst.147 As is common with late metal catalysts, branching of the polymer chains is observed as a result of alkyl group redistribution. 

The hyperbranched polymer, as obtained by the dehydropolymerization of n-Bu2SnH2 with a rhodium catalyst, has a kmax value of 394 nm98, which is slightly red-shifted with respect to high molecular weight poly(dibutyl)stannane (Table 7, entries 2-5). 

Poly(dioctyl)stannane and poly(dihexyl)stannane exhibit a reversible thermochromic behaviour as a result of a phase transition at ca 40 °C. A discolouration of the polymers was observed upon slightly warming above room temperature and variable-temperature UV-vis spectrometry showed a reduction of the >.max values of (n-Oct2Sn) in toluene solution from 384 to 369 nm and of (n-Hex2Sn) from 398 to 382 nm82. On the other hand, however, poly(dibutyl)stannane and poly(diaryl)stannane do not exhibit thermochromic behaviour in the temperature range between —10 to 90 °C and —20 to 90 °C82 100, respectively. 

ETHYLHEXYLOXYCARBONYLMETHYLTHIO)DIBUTYL STANNANE DIBUTYI TIN BIS(ISOOCTYLTHIO-GLYCOLLATE) DIBUTYLZINN-S,S -BIS(ISOOCTYL-THIOGLYCOLAT) (GERMAN)... 

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

Poly(n-dibutyl stannane) Chloroform, THF, toluene Methanol 616... 

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