754-25-6Relevant academic research and scientific papers
Trifluoromethyl Group 2B Compounds: Bis(trifluoromethylcadmium*Base. New, More Powerful Ligand-Exchange Reagents and Low Temperature Difluorocarbene Sources
Krause, L. J.,Morrison, J. A.
, p. 2995 - 3001 (2007/10/02)
Lewis base adducts of bis(trifluoromethyl)cadmium have been isolated from the interaction of bis(trifluoromethyl)mercury with dimethylcadmium in solvents like THF, glyme, diglyme, or pyridine.Lewis base exchange, for example, pyridine for glyme, occurs upon dissolution of the glyme adduct, (CF3)2Cd*g, g = CH3OCH2CH2OCH3, in pyridine.The (CF3)2Cd*base species are shown to be much more reactive than (CF3)2Hg since the cadmium compounds are reactive at temperatures at least 100 deg C below that required for the mercurial.At ambient temperatures ligand exchanges between SnBr4 or GeI4 and (CF3)2Cd*glyme are found to be most convenient preparations of (CF3)4Sn (66percent yield) or (CF3)4Ge (43percent yield); the formation of (CF3)3P from the reaction of PI3 also occurs, but the amounts isolated are smaller.The reaction of acyl halides with (CF3)2Cd*g proceeds at subambient temperature to yield the acyl fluoride, ca. 90percent yield, and difluorocarbene which can be trapped stereospecifically by, e.g., cis-2-butene at -30 deg C.Difluorocarbene formation occurs at temperatures at least as low as -78 deg C.
Formation and reactions of the (trifluoromethyl)tin bromides CF3SnBr3 and (CF3)2SnBr2
Krause,Morrison
, p. 604 - 607 (2008/10/08)
The formation of CF3SnBr3 and (CF3)2SnBr2 from the reaction of (CF3)2Hg and SnBr4 at temperatures of 112, 121, and 130°C has been followed in a semikinetic manner. The data indicate that the (trifluoromethyl)tin bromides are easily formed in reactions that proceed to equilibria, but the decomposition of more fully substituted species, e.g., (CF3)3SnBr, is almost immediate and severely limits the temperature range that can be utilized. The methylated compounds CF3Sn(CH3)3 and (CF3)2Sn(CH3)2 are easily formed in high yield. The latter reacts with excess Cd(CH3)2 to yield CF3Sn(CH3)3 while the former reacts with CH3Li to yield Sn(CH3)4. The formation of an unstable hydride, CF3SnH3, is also demonstrated.
