TY - JOUR

T1 - Synthesis and characterization of organo-scandium and yttrium complexes stabilized by phosphinoamide ligands

AU - Halcovitch, Nathan R.

AU - Fryzuk, Michael D.

PY - 2012/2/7

Y1 - 2012/2/7

N2 - Addition of three equivalents of phosphinoamine, (ArNHP iPr 2) [Ar = 3,5-dimethylphenyl] to M(CH 2SiMe 3) 3(THF) 2 [M = Sc, Y] precursors gives complexes of the form (ArNP iPr 2) 3M(THF) [M = Sc, Y]. In the case of scandium, addition of Sc(CH 2SiMe 3) 3(THF) 2 to (ArNP iPr 2) 3Sc(THF) affords (ArNP iPr 2) 2Sc(CH 2SiMe 3)(THF), which has been isolated and structurally characterized. In contrast, addition of Y(CH 2SiMe 3) 3(THF) 2 to (ArNP iPr 2) 3Y(THF) generates a distribution of phosphinoamide- containing products consistent with the formulations (ArNP iPr 2) 2Y(CH 2SiMe 3)(THF) and (ArNP iPr 2)Y(CH 2SiMe 3) 2(THF), as ascertained using NMR spectroscopy. Attempts to react the alkyl-containing phosphinoamide complexes with small molecules such as H 2 led to disproportionation type processes.

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

U2 - 10.1039/c1dt11501d

DO - 10.1039/c1dt11501d

M3 - Journal article

AN - SCOPUS:84856748691

VL - 41

SP - 1524

EP - 1528

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 5

ER -