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Crystal structure of a binuclear mixed-valence ytterbium complex containing a 2-anthracene-substituted phenoxide ligand.


ABSTRACT: Reaction of 2-(anthracen-9-yl)phenol (HOPhAn, 1) with divalent Yb[N(SiMe3)2]2·2THF in THF-toluene mixtures affords the mixed-valence YbII-YbIII dimer {[2-(anthracen-9-yl)phenolato-?O]bis-(tetra-hydro-furan)-ytterbium(III)}-tris-[?-2-(anthracen-9-yl)phenolato]-?4 O:O;?O:1,2-?,?O-{[2-(anthracen-9-yl)phenolato-?O]ytterbium(II)} toluene tris-olvate, [Yb2(C20H13O)5(C4H8O)2]·3C7H7 or [YbIII(THF)2(OPhAn)](?-OPhAn)3[YbII(OPhAn)]·3C7H7 (2), as the major product. It crystallized as a toluene tris-olvate. The Yb-O bond lengths in the crystal structure of this dimer clearly identify the YbII and YbIII centres. Inter-estingly, the formally four-coordinate YbII centre shows a close contact with one anthracene C-C bond of a bridging OPhAn ligand, bringing the formal coordination number to five.

SUBMITTER: Berg DJ 

PROVIDER: S-EPMC6727046 | BioStudies | 2019-01-01

REPOSITORIES: biostudies

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