Effect of Protonated Organic Cations and Anion-π Interactions on the Magnetic Behavior of Hexabromorhenate(IV) Salts

被引:23
作者
Martinez-Lillo, Jose [1 ]
Pedersen, Anders H. [1 ]
Faus, Juan [2 ]
Julve, Miguel [2 ]
Brechin, Euan K. [1 ]
机构
[1] Univ Edinburgh, EaStCHEM Sch Chem, Edinburgh EH9 3FJ, Midlothian, Scotland
[2] Univ Valencia, Inst Ciencia Mol ICMol, Dept Quim Inorgan, Valencia 46980, Spain
基金
英国工程与自然科学研究理事会;
关键词
X-RAY-STRUCTURE; COMPLEXES;
D O I
10.1021/acs.cgd.5b00436
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two novel Re-IV compounds of formula (Hbpym)(2)[(ReBr6)-Br-IV]center dot 4H(2)O (1) and (H(4)biim)[(ReBr6)-Br-IV]center dot 4H(2)O (2) [Hbpym(+) = 2,2'-bipyrimidinium cation and H(4)biim(2+) = 2,2'-biimidazolium dication] have been prepared and magnetostructurally characterized. 1 and 2 exhibit distinct crystal packing, and the presence of weak intermolecular contacts, such as Re-Br...B-rRe (1 and 2), Re-Br center dot center dot center dot(H2O)center dot center dot center dot BrRe (1 and 2), and Re-Br center dot center dot center dot pi center dot center dot center dot Br-Re (2), lead to different magnetic behaviors. While 1 is antiferromagnetic, 2 is a ferromagnetic compound and indeed the first example of ferromagnetic salt based on the hexabromorhenate(IV) anion. These results suggest a straightforward synthetic route to the preparation of new ferromagnetically coupled Re-IV compounds.
引用
收藏
页码:2598 / 2601
页数:4
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