Synthesis and characterization of new complexes derived from 4-thienyl substituted pyrimidines
作者:Ekaterina M. Cheprakova、Egor V. Verbitskiy、Mikhail A. Kiskin、Grigory G. Aleksandrov、Pavel A. Slepukhin、Aleksei A. Sidorov、Denis V. Starichenko、Yuri N. Shvachko、Igor L. Eremenko、Gennady L. Rusinov、Valery N. Charushin
DOI:10.1016/j.poly.2015.07.016
日期:2015.11
in details. In particular, mononuclear Co(II) complexes 1 and 4 proved to exhibit paramagnetism with large positive zero-field splitting parameters. Dinuclear Co(II) complexes 2a,b show weak antiferromagnetic interactions. Dinuclear Cu(II) complexes 5a,b demonstrate strong antiferromagnetic superexchange interactions via four carboxylate bridges. The systems 2a,b and 5a,b are isolated as exchange coupled
摘要研究了4-噻吩基取代的嘧啶配体(L1-3)与3d金属的各种盐(Co,Zn,Ni,Cu)和铂类化合物(Pt,Pd)的一系列反应。特别是单核Co(OTf)2(L1-3)2(H2O)2(MeCN)2(1),双核Co2(Piv)2(L1-3)4(2a,b),Cu2(Piv)2已获得(L1-3)2(5a,b),多金属多核Li2Co2(Piv)6(L1-3)2(4)和螯合[(L1)Pd(OAc)] 2(6)配合物。所有配合物的结构均已通过X射线衍射确定。还详细研究了配位化合物1、2、4和5的磁性。特别是,单核Co(II)配合物1和4被证明具有大正零场分裂参数的顺磁性。双核Co(II)配合物2a,b显示弱的反铁磁相互作用。双核Cu(II)配合物5a,b显示了通过四个羧酸盐桥的强反铁磁超交换相互作用。系统2a,b和5a,b被隔离为交换耦合二聚体。