W2Cu2(μ-CN)4 squares extended into 1-D structure by cyano-bridges. 2-D 3 and 4 form a square grid pattern with tungsten atoms in the corners and –CN–Cu(dien)–NC– linkages on the edges of the squares. The magnetic behaviour of 1 and 3 indicates the presence of two isolated CuII spins S = 1/2 with a very weak antiferromagnetic coupling through the diamagnetic NC–WIV–CN bridges in the low temperatures. Assembly
这
氰基桥联[Cu II(tetrenH 2)] 2 [W IV(CN)8 ] 2 ·5H 2 O(tetren =
四亚乙基五胺)(1),[Cu II(tetrenH 2)] [Cu II(tetrenH)] [W V(CN)8 ] [W IV(CN)8 ]·2.5H 2 O(2),[Cu II(dien) )] 2 [W IV(CN)8 ]·4H 2 O(dien =
二亚乙基三胺)(3)及其同形的
钼(IV)类似物(4)已经制备并进行了结构表征。1和2是由W 2 Cu 2(μ-CN)4个正方形通过
氰基桥扩展为一维结构而构建的。2-D 3和4形成一个正方形网格图案,其拐角处带有
钨原子,并且在正方形边缘上具有–CN–Cu(dien)–NC–键。1和3的磁行为表明存在两个孤立的Cu II自旋S在低温下, 通过抗磁性NC–W IV –CN桥的反
铁磁耦合非常弱,因此= = 1/2 。部件 图2显示了通过抗磁性[W