octahedrally coordinated and [Cu(Hapo) 4 ](BFA 4 ) 2 is square planar. The complexes Co(Hapo) 2 Br 2 ·C 2 H 5 OH, Ni(Hapo) 2 Br 2 , Cu(Hapo) 2 (NO 3 ) 2 , and the copper(II) halide complexes, are all antiferromagnetic and N-oxide bridged. Such bridging pyridine N-oxide, whilst common with copper(II), is rare with cobalt(II) and nickel(II). The temperature dependence of the magnetism of Ni(Hapo) 2 Br 2 has
摘要利用红外光谱,X射线粉末衍射光谱,磁测量和电子光谱对
液氮温度进行了表征,确定了2-
氨基吡啶N-氧化物(Hapo)的
金属配合物。根据光谱学证据,在几乎每种情况下,中性Hapo似乎都是O-供体
配体。[M(Hapo)6] X 2]配合物(M = Mn,Co和Ni;从ClO 4,BF 4和NO 3提取的X)是八面体配位的,[Cu(Hapo)4](BFA 4)2是方形平面。Co(Hapo)2 Br 2·C 2 H 5 OH,Ni(Hapo)2 Br 2,Cu(Hapo)2(NO 3)2和
铜(II)卤化物络合物都是反
铁磁性的,并且是N-氧化物桥接。这种桥联的
吡啶N-氧化物虽然与
铜(II)常见,但对于
钴(II)和
镍(II)却很少。Ni(Hapo)2 Br 2的磁性与温度的关系已与各种模型进行了比较。其他具有
钴(II)和
镍(II)卤化物的Hapo配合物似乎是卤化物桥接的。一些先前报道的与
吡啶N-氧化物(po)的M(po)Hal