420-60-0Relevant articles and documents
Reactions of RSe-EMe3 (E = Si, Ge, Sn, Pb) with XeF2 - RSe-F equivalents in the fluoroselenenylation of acetylenes
Poleschner, Helmut,Heydenreich, Matthias,Schilde, Uwe
, p. 1307 - 1313 (2007/10/03)
Selenides of the type R1Se-EMe3 (E = Si, Ge, Sn, Pb) react with xenon difluoride by cleavage of the Se-E bond to yield the R1Se-F intermediate and the fluorides Me3E-F, whereas the Se-C bond in PhSe-tBu (E = C) is stable against XeF2. The presence of R1Se-F intermediates is confirmed by addition to acetylenes (4-octyne, 3-hexyne). Thus, the fluoroselenenylation of acetylenes gives fluoro(organylseleno)olefins in preparative yields. In the cases of E = Si, Ge, Sn, and Pb, aryl and n-alkyl groups are suitable as the substituent R1. The X-ray crystal structural analysis of (E)-3-(p- carboxyphenylseleno)-4-fluorohex-3-ene - the first example of an uncharged fluoroselenoolefin synthesized from p-EtO2C-C6H4-Se-SnMe3, XeF2, and 3- hexyne followed by an ester hydrolysis - shows that the addition of the selenenylfluoride intermediate to the acetylene proceeds via a trans- addition, as is known for the R2Se2-XeF2 reagents.
Synthesis and M?ssbauer and vibrational spectra of some new tin(IV)-fluorine compounds
Levchuk,Sams,Aubke
, p. 43 - 50 (2008/10/08)
The solvolysis of methyltin(IV)-chlorine compounds of the general type (CH3)nSnCl4-n, with n ranging from 0 to 4, is studied in aqueous and anhydrous hydrogen fluoride under a variety of conditions. The studies in anhydrous HF have resulted in the synthesis of the new compounds methyltin(IV) trifluoride, dimethyltm(IV) chloride fluoride, and methyltin-(IV) dichloride fluoride. A convenient route to SnCl2F2 is found in addition. Interaction of this compound with either S2O6F2 or ClOSO2F results in the formation of SnF2(SO3F)2. Structural proposals for these compounds are based on infrared, Raman and 119Sn M?ssbauer spectra. All new compounds are found to be polymeric via fluorine or fluorosulfate bridges, resulting in penta- or hexacoordination around tin. Signs of the electric field gradients in these and some related compounds are deduced. Dialkyltin(IV) fluorides are easily obtained when the corresponding chlorides are solvolyzed in aqueous hydrogen fluoride.
