Tetranuclear complexes composed of dinickel(II) macrocyclic fragments bridged by 5,5′-(1,3-phenylene)bis-1H-tetrazolato and N,N-bis(tetrazol-5-ato)amine coligands: Synthesis, structures and magnetic properties
作者:Jochen Lach、Anastasiya P. Mosalkova、Sergei V. Voitekhovich、Pavel N. Gaponik、Berthold Kersting
DOI:10.1016/j.poly.2012.09.027
日期:2013.1
The dinuclear nickel(II) complex [Ni2LCl]+, where L2− represents a 24-membered macrocyclic hexamine-dithiophenolate ligand, reacts with 5,5′-(1,3-phenylene)bis-1H-tetrazole and N,N-bis(tetrazol-5-yl)amine to give the tetranuclear complexes [(Ni2L)2(N4C–X–CN4)]+, where X = 1,3-C6H4 (1) and NH (2). The new complexes were both isolated as perchlorate or tetraphenylborate salts and characterized by elemental
双核镍(II)络合物[Ni 2 LCl] +,其中L 2−表示24元大环己胺-二硫酚盐配体,与5,5'-(1,3-亚苯基)bis-1 H-四唑反应, N,N-双(四唑-5-基)胺生成四核配合物[(Ni 2 L)2(N 4 C–X–CN 4)] +,其中X = 1,3-C 6 H 4(1)和NH(2)。分离出的新络合物均为高氯酸盐或四苯基硼酸盐,并通过元素分析,UV / Vis,IR光谱和X射线分析进行了表征。四苯基硼酸盐的晶体结构显示桥联的双四唑酸酯部分通过其环的N2和N3原子连接两个双核[Ni 2 L] 2+片段。温度相关的磁化率测量表明,双核[Ni 2 L] 2+亚基中的Ni II离子之间存在弱的铁磁交换相互作用,其中1 [BPh 4 ]的磁交换耦合常数为J 1 = 16.6 cm -1。2和J 1 = 16.8 cm -1对于2 [BPh 4 ] 2(H = –2 J S 1 S