Ground Spin State Variation in Carboxylate‐Bridged Tetranuclear [Fe
<sub>2</sub>
Mn
<sub>2</sub>
O
<sub>2</sub>
]
<sup>8+</sup>
Cores and a Comparison with Their [Fe
<sub>4</sub>
O
<sub>2</sub>
]
<sup>8+</sup>
and [Mn
<sub>4</sub>
O
<sub>2</sub>
]
<sup>8+</sup>
Congeners
作者:Phalguni Chaudhuri、Eva Rentschler、Frank Birkelbach、Carsten Krebs、Eckhard Bill、Thomas Weyhermüller、Ulrich Flörke
DOI:10.1002/ejic.200390076
日期:2003.2
are antiferromagnetic in nature. Complexes with the Fe4O2 core (1 and 2) and the Mn4O2 core (3 and 4) possess an St = 0 and St = 3 ground state, respectively, regardless of the nature of the bridging carboxylate ligand. In contrast, changing the bridging carboxylates in the [Fe2Mn2O2] core from acetate (5) to diphenylglycolate (6), triphenyl acetate (7), benzoate (8), chloroacetate (9) and propionate
包含 [MA(μ3-O)2MB]8+ 蝴蝶核的十种新四核复合物的合成 [MA = MB = FeIII(1 和 2),MA = MB = MnIII(3 和 4)和 MA = FeIII,MB =描述了使用 1,4,7-三甲基-1,4,7-三氮杂环壬烷 (L) 作为封端配体、水杨醛肟二价阴离子 (salox2-) 和六种不同的羧酸根阴离子作为桥接配体的 MnIII (5−10)]。[L2Fe2(μ3-O)2(salox)2(diphenylglycolate)3Fe2](ClO4) (1), [L2Mn2(μ3-O)2(salox)2(diphenylglycolate)3Mn2](ClO4)的晶体结构 (3) ), [L2Fe2(μ3-O)2(salox)2(acetate)3Mn2](ClO4) (5), [L2Fe2(μ3-O)2(salox)2(diphenylglycolate)3Mn2](ClO4)