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Issue 5, 2012
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Synthesis and characterization of organo-scandium and yttrium complexes stabilized by phosphinoamide ligands

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Abstract

Addition of three equivalents of phosphinoamine, (ArNHPiPr2) [Ar = 3,5-dimethylphenyl] to M(CH2SiMe3)3(THF)2 [M = Sc, Y] precursors gives complexes of the form (ArNPiPr2)3M(THF) [M = Sc, Y]. In the case of scandium, addition of Sc(CH2SiMe3)3(THF)2 to (ArNPiPr2)3Sc(THF) affords (ArNPiPr2)2Sc(CH2SiMe3)(THF), which has been isolated and structurally characterized. In contrast, addition of Y(CH2SiMe3)3(THF)2 to (ArNPiPr2)3Y(THF) generates a distribution of phosphinoamide-containing products consistent with the formulations (ArNPiPr2)2Y(CH2SiMe3)(THF) and (ArNPiPr2)Y(CH2SiMe3)2(THF), as ascertained using NMR spectroscopy. Attempts to react the alkyl-containing phosphinoamide complexes with small molecules such as H2 led to disproportionation type processes.

Graphical abstract: Synthesis and characterization of organo-scandium and yttrium complexes stabilized by phosphinoamide ligands

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Supplementary files

Article information


Submitted
08 Aug 2011
Accepted
31 Oct 2011
First published
06 Dec 2011

Dalton Trans., 2012,41, 1524-1528
Article type
Paper

Synthesis and characterization of organo-scandium and yttrium complexes stabilized by phosphinoamide ligands

N. R. Halcovitch and M. D. Fryzuk, Dalton Trans., 2012, 41, 1524
DOI: 10.1039/C1DT11501D

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