Manganese–Salicyloximate Clusters Starting from [Mn^II(hfacac)₂]: From Mn₄ to Mn₁₂

Abstract

The systematic exploration of the reactivity of [Mn(hfacac) 2 ] with R-salicyloximes (R-saloxH 2 : R = H, Me, Et) yielded a family of clusters with nuclearities ranging from Mn 4 to Mn 12 . The compounds with formula [Mn 6 (O) 2 (salox) 6 -(CF 3 COO) 2 (EtOH) 4 ] (1) and [Mn 12 (salox) 12 (O) 4 (N 3 ) 4 (H 2 O) 2 -(MeOH) 6 ] (4) show two or four linked {Mn(μ 3 -O)(salox) 3 } + triangular subunits. Magnetic measurements revealed spin [a]

Synthesis and crystal structure tetrakis(μ2-methanolato)-dimethanol-bis(μ2-2-acetyl-1,3-bis(3,5-dichloro-2-oxidophenyl)propane-1,3-bis(olato)-κ5 O 1,O 2,O 3:O 3,O 4,O 5), tetramanganese(III), C40H40Cl8Mn4Zhao1, Zhao2, Li3 et al. 2017Zeitschrift Für Kristallographie - New Crystal Structures0000View full textAdd to dashboardCite

“…These compounds can be used as potential chelating agents and excellent coordination abilities with many metals [4][5][6][7][8][9]. Oxime-type compounds and their complexes could be applied in many fields, such as magnetic materials [10][11][12], optical materials [13][14][15] etc.…”

A Ferromagnetic Salicylaldoximate/Azide MnII2MnIII6 Cluster with an S = 17 Ground State and a Single-Molecule-Magnet Response

“…It is worth noting that for these systems the easy axes of the Mn III cations are roughly parallel, and they reached the largest energy barrier to magnetization reversal for d transition-metal clusters . In addition to the Mn III 3 and Mn III 6 cores, other molecular clusters, based in the {Mn III 3 (μ 3 -O)} fragment, are those consisting of four stacked triangles (Mn III 12 ), Mn II bicapped triangles , with a Mn II 2 {Mn III 3 (μ 3 -O)} core, or Mn II bicapped hexanuclears with a Mn II 2 {Mn III 6 (μ 3 -O) 2 } − core. The presence of two additional Mn II cations can reduce or increase the S ground state by up to five units as a function of the sign and magnitude of the magnetic interactions.…”

“…The presence of two additional Mn II cations can reduce or increase the S ground state by up to five units as a function of the sign and magnitude of the magnetic interactions. In fact, Hendrickson proved experimentally that the pentanuclear Mn II 2 {Mn III 3 (μ 3 -O)} core can reach up to the maximum S = 11 ground state, whereas only AF interactions between the Mn II and Mn III cations have been found until now for the Mn II 2 {Mn III 6 (μ 3 -O) 2 } core, resulting in S = 1 and 7 ground states. − …”