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A Room-Temperature Stable Y(II) Aryloxide: Using Steric Saturation to Kinetically Stabilize Y(II) Complexes

Moehring SA, Miehlich M, Hörger C, Meyer K, Ziller JW, Evans WJ (2020)

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Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.1021/acs.inorgchem.9b03587

Abstract

The utility of the bulky aryloxide ligands 2,6-Ad2-4-Me-C6H2O^- (^Ad,Ad,MeArO^-) and 2,6-Ad2-4-t-Bu-C6H2O^- (^Ad,Ad,t-BuArO^- Ad = 1-adamantyl) for stabilizing the Y(II) ion is reported and compared with the results with 2,6-t-Bu2-4-Me-C6H2O^- (Ar′O^-). In contrast to the reduction product obtained from reducing Y(OAr′)3 with potassium graphite, which is only stable in solution for 60 s at room temperature, KC8 reduction of Y(OAr^Ad,Ad,t-Bu)3 in THF in the presence of 2.2.2-cryptand (crypt) produces the room-temperature stable, crystallographically characterizable Y(II) aryloxide [K(crypt)][Y(OAr^Ad,Ad,t-Bu)3]. The X-band EPR spectrum at 77 K shows an axial pattern with resonances centered at g= 1.97 and g= 2.00 and hyperfine coupling constants of A = 156.5 G and A= 147.8 G and at room temperature shows an isotropic pattern with giso = 1.98 and Aiso = 153.3 G, which is consistent with an S = 1/2 spin system with nuclear spin I = 1/2 for the ⁸⁹Y isotope (100% natural abundance).

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How to cite

APA:

Moehring, S.A., Miehlich, M., Hörger, C., Meyer, K., Ziller, J.W., & Evans, W.J. (2020). A Room-Temperature Stable Y(II) Aryloxide: Using Steric Saturation to Kinetically Stabilize Y(II) Complexes. Inorganic Chemistry. https://dx.doi.org/10.1021/acs.inorgchem.9b03587

MLA:

Moehring, Samuel A., et al. "A Room-Temperature Stable Y(II) Aryloxide: Using Steric Saturation to Kinetically Stabilize Y(II) Complexes." Inorganic Chemistry (2020).

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