Supramolecular self-assembly of a toroidal inclusion complex, [NH4][Co8(MeCO2)8(OMe)16][PF6]

Aggregation of [(tBu3SiS)MX]: Structures of {[Br2Fe(μ-SSitBu3)2FeBr(THF)]Na(THF)4}∞, cis-[(THF)FeI]2(μ-SSitBu3)2, [(tBu3SiS)Fe]2(μ-SSitBu3)2, and Comparative Structure and Magnetism Studies of [(tBu3SiS)MX]n (M = Fe, Co, X

“…In the past 15 years, there have been numerous reports of ring or wheel compounds, yet those described herein are quite unusual in that a cyclic array of tetrahedra, bent at the M(μ-X)(μ-SSi t Bu 3 ) “hinges”, comprise the molecules. Most versions consist of linked octahedra containing M(III) (M = Cr, − Fe) − or M(II) (M = Mn, , Co, − Ni) , ions coordinated by “hard” oxygen- or nitrogen-based ligands, including many that are bidentate or polydentate. Excluding polyoxoanions, few rings exist in group 5 or in the second (e.g., β-MoCl 4 or [MoCl 2 (μ-Cl) 2 ] 6 ) or third rows.…”

Structural and Functional Evolution of Metallacrowns

“…16-MC-8 complexes with oxygen atom bridges have been constructed with a variety of metal ions including Ca II , Ti IV , , V III , , V IV , Cr III , − Mn III , mixed-valent Mn II 4 Mn III 4 , Fe III , ,− Co III , Cu II , ,, Mo V , − mixed-valent Mo V 7 Mo VI , Cd II , Nd III , Sm III , Gd III , 843 , Bi III , mixed-metal Na I 6 Cu II 2 , and mixed-metal W VI 4 Sn IV 4 . In addition, 16-MC Mn III -8 encapsulates one Ce IV ion, 16-MC Fe III -8 may encapsulate one Cs I ion 90,829 (Figure ), and 16-MC Cu II -8 may capture one Cu II within the central cavity .…”

Synthesis, Electronic, Magnetic and Structural Characterization of New Trinuclear Mixed‐Valence CoIII‐CoII‐CoIII Complex.

“…From the discovery of the Mn12Ac some research groups have been designed and synthesized many mixed‐valence compounds which present SMM or SCM behaviour for example: [Mn 12 O 12 (O 2 CR) 16 (solv) 4 ] family, [Mn 8 O 2 (py) 4 (O 2 CEt) 8 (L) 2 ](ClO 4 ) 2 and [Mn 9 (O 2 CEt) 12 (pdm)(pdmH) 2 (L) 2 ], [Co 7 (OH) 6 (L) 6 ](ClO 4 ) 3 , [Mn 2 (saltmen) 2 Ni(pao) 2 (py) 2 ](ClO 4 ) 2, . The corresponding chemistry based on Co II,III centres is much less developed (e. g. Beattie et al ., 1998), perhaps because despite their apparent simplicity, these synthesis are a difficult craft affording low yields, or remain poorly reproducible.…”