A zig-zag [MnII4] cluster from a novel bis(β-diketonate) ligand

被引：31

作者：

Aromi, Guillem

Gamez, Patrick

Boldron, Christophe

Kooijman, Huub

Spek, Anthony L.

Reedijk, Jan

机构：

[1] Univ Barcelona, Dept Quim Inorgan, Barcelona 08028, Spain

[2] Leiden Univ, Gorlaeus Labs, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

[3] Univ Utrecht, Bijvoet Ctr Biomol Res Crystal & Struct Chem, NL-3584 CH Utrecht, Netherlands

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2006年 / 10期

关键词：

ligand design; O ligands; NMR spectroscopy; magnetism; Mn;

D O I：

10.1002/ejic.200600105

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new ligand, H(5)L3, has been synthesized featuring seven linearly arranged oxygen donors in form of two 1,3-diketone and three phenol groups. The X-ray structure of H(5)L3 unveils a rare case where one of the diketones is in the enolic form and the other one in the bis(carbonyl) form. This structure is shown by H-1 NMR to persist in solution. Reaction of H5L3 with Mn(AcO)(2) in pyridine leads to the novel tetranuclear cluster [Mn-4(H(2)L3)(2)(OAc)(2)(PY)(5)] (1), which displays an unusual core in form of a zig-zag chain. Bulk magnetic measurements revealed the existence of weak antiferromagnetic coupling within the molecule. Numerical fits to a model described by the Hamiltonian H -2J(1)(S1S2 + S3S4) - 2J(2)(S2S3) yield coupling constants of J(1) = -2.23 cm(-1), J(2) = -0.85 cm(-1) and g = 2.08. (c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006.

引用

页码：1940 / 1944

页数：5

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