Details

Autor(en) / Beteiligte

• Helm, David L.
• Zeller, Matthias
• Zaleski, Curtis M.

Titel

The Importance of Synthetic Conditions on Manganese-Based 12-Metallacrown-4 Formation

Ist Teil von

• Journal of chemical crystallography, 2021-06, Vol.51 (2), p.205-214

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Alterations to synthetic conditions either by varying stochiometric ratios of the reactants or solvent choice yield two new metallacrowns (MCs): Mn(Hsal) 2 [12-MC Mn III (N)shi -4](DMF) 6 ·4DMF, 1 , where − Hsal is salicylate, shi 3− salicylhydroximate, and DMF is N , N -dimethylformamide, and {Na 2 (OAc) 2 [12-MC Mn III (N)shi -4](MeOH) 4 (H 2 O) 2 2MeOH} n , 2 , where − OAc is acetate and MeOH is methanol. Compound 1 crystallizes in the monoclinic space group C 2/c with a = 19.0264 (6) Å, b = 23.1440 (8) Å, c = 18.6704 (5) Å, α = 90°, β = 90.3600 (10)°, γ = 90°, V = 8221.3 (4) Å 3 , and Z = 4. Compound 2 crystallizes in the triclinic space group P 1 - with a = 7.8995 (7) Å, b = 11.2374 (10) Å, c = 14.5559 (13) Å, α = 112.535 (3)°, β = 91.987 (3)°, γ = 98.558 (3)°, V = 1174.22 (18) Å 3 , and Z = 1. Compound 1 is a discrete metallacrown molecule that contains four ring Mn III ions and a Mn II ion captured in the metallacrown central cavity. The Mn II ion is tethered to the metallacrown via two salicylate bridges that also bridge to the ring Mn III ions. Compound 2 is a one-dimensional chain of metallacrowns. The metallacrown consists of four ring Mn III ions and two sodium ions which are bound on opposite faces of the metallacrown cavity. Each di-sodium metallacrown is then linked to neighboring metallacrowns through acetate anion bridges to form a one-dimensional chain. Graphic Abstract The complex Na 2 (OAc)2[12-MC Mn III (N)shi -4](MeOH) 4 (H 2 O) 2 ·2MeOH forms a one-dimensional chain of metallacrowns by linking together neighboring metallacrowns through acetate anion bridges.