[(C₅Me₅)Yb(μ‐η⁸,η⁸‐cot′′′)Yb(μ‐η⁸,η⁸‐cot′′′)Yb(C₅Me₅)]—A Unique Tetradecker Sandwich Complex of a Divalent Lanthanide

Abstract

All stacked up: The f elements, too, can form well‐defined multidecker sandwich complexes—as long as a suitable ligand set is chosen. In the case of the title compound, a combination of pentamethylcyclopentadienyl and 1,3,6‐tris(trimethylsilyl)cyclooctatetraenyl ligands (cot′′′) was employed to give a nearly linear stacked Yb3 arrangement (see picture).

Reduction of a Cerium(III) Siloxide Complex To Afford a Quadruple‐Decker Arene‐Bridged Cerium(II) Sandwich

“…Complex 3 is unprecedented in lanthanide chemistry, and it is a unique example of a quadruple‐decker complex supported by non‐Cp ligands and the first multi‐decker complex of non‐classical lanthanides. Only one example of a lanthanide quadruple‐decker complex, containing Yb II , was previously reported by Edelmann and co‐workers …”

Retraction: Lanthanide–Alkali Metal Sandwich Complexes: Synthesis, Structure, and Solvent‐Mediated Redox Transformations, and One‐Dimensional Frameworks Assembled through Cation–Arene π Interactions

“…Divalent lanthanocenes [(C 5 Me 5 ) 2 Ln] with sandwich structure have attracted considerable attention in the past few decades. [21] Evans et al reported triple-decker bent metallocenes complexes of divalent lanthanides [(m-h 8 [22] Recently, Edelmann et al reported a rare tetradecker sandwich complex of a divalent lanthanide, namely, [(C 5 Me 5 )Yb(m-h 8 [23] Half-sandwich bistetramethylaluminate complexes of the rare earth metals were reported by Anwander et al [24] Complexes with one, (2), Sm1À N2 2.550(2), Si1ÀN1 1.693 (2), Si1ÀN2 1.701 (2), K1ÀO1 2.752 (2), K1À C14 3.222 (3), K1ÀC16 3.077 (3), K1ÀC17 3.094 (3), K1ÀC15 3.114 (3), K1À C18 3.168 (3), K1ÀX1 A 2.829, K1ÀX1B 2.925; N1-Sm1-N1A 180.00 (10), N2-Sm1-N2A 180.00 (9), N1-Sm1-N2 63.32 (7). (2) LnÀN2 2.550 (2) 2.442 (2) Si1ÀN1 1.693 (2) 1.703 (2) Si1ÀN2 1.701 (2) 1.696 (2)…”

Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets

“…[14] Fore xample, reactions of divalent lanthanide halide sources with large cyclic molecules such as cyclooctatetraene led to trivalent thulium Cot compounds, [15] some of which behave as fieldinduced SMMs. [2c] Despite these difficulties,w ell-defined divalent lanthanide organometallics with inverted and multiple decker sandwiches of Cot ligands have been reported, [16] including divalent bis-Cot complexes. [16c,17] In comparison with bulky substituted Cp ligands, [1b-d, f, 6] the access to highly symmetrical Cot-and Cnt-based compounds from as ymmetry-adapted argument [3,18] should simplify the bonding description.…”