Issue 17, 2019

Versatility of cyclooctatetraenyl ligands in rare earth metal complexes of the [M2(COT)3(THF)2] (M = Y and La) type

Abstract

Two new organometallic cyclooctatetraenyl complexes of the type [M2(COT)3(THF)2] (M = Y and La) have been prepared, using optimized synthetic procedures, and fully characterized by X-ray diffraction analysis, IR and 1H NMR spectroscopies. The structures can be represented as formed by the double-decker [M(COT)2] anion with an asymmetrically bound cationic [M(COT)(THF)2]+ unit. The COT rings in the anionic sandwich are not equidistant from the metal with the M–COTcentroid distances measuring at 1.991(5) Å and 2.074(5) Å for [Y(COT)2]vs. 2.045(4) Å and 2.154(5) Å for [La(COT)2]. The sandwich fragments are η2-coordinated to the second metal center with the average M–C distances of 2.837(4) Å and 2.879(5) Å for yttrium and lanthanum complexes, respectively. The M–COTcentroid distances in the cationic unit are 1.962(4) Å for the former and 2.009(2) Å for the latter.

Graphical abstract: Versatility of cyclooctatetraenyl ligands in rare earth metal complexes of the [M2(COT)3(THF)2] (M = Y and La) type

Supplementary files

Article information

Article type
Paper
Submitted
26 Cʼhwe. 2019
Accepted
28 Meur. 2019
First published
08 Ebr. 2019

Dalton Trans., 2019,48, 5614-5620

Author version available

Versatility of cyclooctatetraenyl ligands in rare earth metal complexes of the [M2(COT)3(THF)2] (M = Y and La) type

J. Greenough, Z. Zhou, Z. Wei and M. A. Petrukhina, Dalton Trans., 2019, 48, 5614 DOI: 10.1039/C9DT00868C

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