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• W2051278717 endingPage "97" @default.
• W2051278717 startingPage "89" @default.
• W2051278717 abstract "The chemistry of yttrium with the trimethylsilylmethyl/2,6-di-tert-butyl-phenoxide ligand combination has been examined. The anionic dialkyl–diaryloxide complexes, {(Me 3 SiCH 2 ) 2 Ln(OC 6 H 3 t Bu 2 -2,6) 2 } − (Ln=Y, Lu), were prepared and their reactivity and that of the neutral dialkyl–aryloxide complex (Me 3 SiCH 2 ) 2 Y(OC 6 H 3 t Bu 2 -2,6)(THF) 2 , 1 , has been studied and compared with cyclopentadienyl-containing organolanthanide complexes. {(Me 3 SiCH 2 ) 2 Y(OC 6 H 3 t Bu 2 -2,6) 2 }{[(THF) 3 Li] 2 Cl}, 2 , was prepared from the reaction of YCl 3 with two equivalents of LiCH 2 SiMe 3 and two equivalents of LiOC 6 H 3 t Bu 2 -2,6 and crystallized with an unusual cation which can be viewed as a LiCl adduct of [Li(THF) x ] + . [(Me 3 SiCH 2 ) 2 Lu(OC 6 H 3 t Bu 2 -2,6) 2 ][Li(THF) 4 ](THF) 2 , 3 , was prepared analogously and crystallized with a conventional cation. Both 2 and 3 have distorted tetrahedral coordination geometries around the metals. Ring-opening polymerization of ε -caprolactone was observed for 1 – 3 , but only complex 1 was found to polymerize ethylene. NMR and mass spectroscopic analyses show that the more reactive complex 1 also exhibits metallation reactivity with pyridine, toluene, phenylacetylene, CH 3 CN, Me 2 CHCN, PhCN, and PhCH 2 CN and insertion chemistry with Me 3 CNC, CO, CO 2 , PhNCO, and PhNCS. However, isolation of the organometallic products has been difficult due to the complexity of the reaction mixtures." @default.
• W2051278717 created "2016-06-24" @default.
• W2051278717 creator A5009963089 @default.
• W2051278717 creator A5011086784 @default.
• W2051278717 creator A5089479056 @default.
• W2051278717 date "1998-10-01" @default.
• W2051278717 modified "2023-10-14" @default.
• W2051278717 title "Synthesis, structure, and reactivity of cyclopentadienyl-free trimethylsilylmethyl yttrium di-tert-butylphenoxide complexes" @default.
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