WebNov 3, 2004 · Scandium half-metallocene-catalyzed syndiospecific styrene polymerization and styrene-ethylene copolymerization: unprecedented incorporation of syndiotactic … WebDec 31, 2007 · The corresponding base-free cations [M(L)(CH2SiMe3)2]+ were studied by 29Si NMR spectroscopy and/or DFT and found to possess β-Si-C agostic alkyl groups in most instances. The isolated cations [Sc(fac-N3)(CH2SiMe3)2(THF)] + underwent THF substitution reactions with OPPh3 or pyridine, Sc - alkyl migratory insertion with …
Did you know?
Web(eta-Cyclopentadienyl)-bis(trimethylsilylmethyl)-tetrahydrofuran-scandium. Central atom: Scandium WebThe scandium half-sandwich (bis)alkyl complex [Sc(η5-C5Me4{SiMe2(C6F5)})(CH2SiMe3)2(THF)] has been prepared by σ-bond metathesis between [Sc(CH2SiMe3)3(THF)2] and C5Me4H{SiMe2(C6F5)}. Structural characterization by single crystal X-ray diffraction revealed the typical piano-stool geometry for this type of …
WebApr 13, 2007 · Reaction of (C5Me5)Lu(CH2SiMe3)2(THF) with pyridine results in the activation of an ortho C−H bond to form the corresponding η2-(N,C)-pyridyl complex with … WebOct 1, 2009 · Alkane elimination reactions of [Sc(CH2SiMe3)3(thf)2] or [Sc(CH2Ph)3(thf)3] with aminopyridines (1a = (2,6‐diisopropylphenyl)‐[6‐(2,4,6‐triisopropylphenyl)pyridin‐2‐yl]amine,1b = [6‐(2,4,6‐triisopropylphenyl)pyridin‐2‐yl]‐(2,4,6‐trimethylphenyl)amine, 1c = …
WebJan 21, 2009 · Stoichiometric reactions between mesityl azide (MesN3, Mes = 2,4,6-C6H2Me3) and amino-phosphine ligated rare-earth metal alkyl, LLn(CH2SiMe3)2(THF) (L = (2,6-C6H3Me2)NCH2C6H4P(C6H5)2; Ln = Lu (1a), Sc (1b)), amide, LLu(NH(2,6-C6H3iPr2))2(THF) (2) and acetylide at room temperature gave the amino-phos … Web[Sc(CH2SiMe3)2(THF)(fac-1,4,7-trimethyl-1,4,7-triazacyclononane)](B(C6F5)4) 1043413-38-2 : none : 100%: 4. First-aid measures 4.1 Description of necessary first-aid measures …
WebThe reactions of 1,3-diisopropyl-4,5-dimethylimidazolin-2-imine (ImiPrNH) with the trimethylsilylmethyl (neosilyl) complexes [M(CH2SiMe3)3(THF)2] (M=Sc, Y, Lu) in a 3:1 ratio afforded tetramethylsilane (TMS) and the dinuclear imidazolin-2-iminato complexes [M2(ImiPrN)6(THF)n] (1a, M=Sc, n=0; 1b, M=Y, n=1; 1c, M=Lu, n=1), in which the metal …
WebThe ligand was attached to scandium in an efficient alkane elimination reaction by treatment of in situ generated Sc(CH2SiMe3)3·-2THF with diproteo 1, yielding the alkylscandium species [(CpNMeSiNR)Sc(CH2SiMe3)], 2, directly in 52% yield. The reaction was 100% diastereoselective for the (1S)-(RSc)/(1R)-(SSc) pair of enantiomers. clicks nquthu contact numberWebFeb 16, 2010 · Read "Scandium, yttrium, the lanthanides, Annual Reports Section "A" (Inorganic Chemistry)" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. bnf selexidWebThe N-heterocyclic carbene ligated scandium trialkyl complexes [{2,6-C6H3R2NCH}2CSc(CH2SiMe3)3] (R = Me (1); R = iPr (2)) were synthesized by the reaction of 1 equiv of [Sc(CH2SiMe3)3(THF)2] with the corresponding ligand [{2,6-C6H3R2NCH}2C]. Their molecular structures have been established by single-crystal X-ray diffraction. click snowboard bindingsWebNevertheless, only the THF-free system 4/[PhNMe2H][B(C6F5)(4)] shows good ethylene polymerization activity, showing that a single THF molecule per Sc suffices to quench the catalysis. Dinuclear 3 reacts with ethylene via stoichiometric insertion into the Sc-CH2N bond to yield {[CH2CH2CH2(mu-N)-1,4,6-trimethyl-1,4diazepine]Sc(CH2SiMe3)}(2) (7). bnf sectionsWebThe trigonal-bipyramidal structure of these dialkyls was confirmed crystallographically for M=Sc. Whereas the scandium complex is stable in solution at room temperature, the yttrium derivative slowly disproportionates to give Y(L 1) 3 which is also accessible from Y(CH 2 SiMe 3) 3 (THF) 3 and three HL 1. bnf septinWebTag:Sc(CH2SiMe3)3(THF)2(41705-65-1) Related Product Information According to the laws, regulations and policies related to " patent products ", the sale of this product is … bnf selsun shampooWebCompound (C5ME4-SIME3)-SC-(CH2-SIME3)2-(THF)with free spectra: 1 NMR. bnf sensory words