64821-69-8Relevant articles and documents
Silicon Tetrakis(trifluoromethanesulfonate): A Simple Neutral Silane Acting as a Soft and Hard Lewis Superacid
Driess, Matthias,Hermannsdorfer, André
supporting information, p. 13656 - 13660 (2021/05/03)
A facile synthesis and isolation of pristine silicon tetrakis(trifluoromethanesulfonate), Si(OTf)4, is reported, acting as the first neutral silicon-based Lewis superacid suitable towards soft and hard Lewis bases. Its OTf groups have a dual function: they are excellent leaving groups and modulate the degree of reactivity towards soft and hard Lewis bases. Exposed to soft Lewis donors, Si(OTf)4 leads to [L2Si(OTf)4] complexes (L=isocyanide, thioether and carbonyl compounds) with retention of all Si?OTf bonds. In contrast, it can cleave C?X bonds (X=F, Cl) of hard organic Lewis bases with a high tendency to form SiX4 (X=F, Cl) after halide/triflate exchange. Most notable, Si(OTf)4 allows a gentle oxydefluorination of mono- and bis(trifluoromethyl)benzenes, resulting in the formation of the corresponding benzoylium species, which are stabilized by the weakly coordinating [Si(OTf)6] dianion.
Triflyloxy-substituted carboranes as useful weakly coordinating anions
Press, Loren P.,Mcculloch, Billy J.,Gu,Chen,Foxman,Ozerov, Oleg V.
supporting information, p. 14034 - 14037 (2015/09/15)
New carborane anions carrying one or three triflyloxy substituents are described. The mono-triflyloxy substituted carborane can be halogenated to give pentabromo and decachloro derivatives with preservation of the B-OTf linkage. The use of [HCB11Cl10OTf]- as a weakly coordinating anion is demonstrated.
Trityl tetraphenylborate as a reagent in organometallic chemistry
Straus, Daniel A.,Zhang, Cheng,Tilley, T. Don
, p. C13 - C17 (2007/10/02)
Trityl tetraphenylborate, prepared from trityl triflate and sodium tetraphenylborate, is shown to be a useful hydride and methyl anion abstraction reagent for organometallic compounds.It reacts with (η5-C5Me5)(PMe3)2RuMe to give the fulvene com