N,N'-(2-苯并咪唑基甲基)亚氨基甲基膦酸的双核镍化合物Ni2(bbimp)2(4,4'-bipy)(H2O)2·2H2O和Ni2(bbimp)2(H2O)2][Ni(bbimp)(H2O)2]2·4H2O的晶体结构和磁学性质

该文报道了N,N′-(2-苯并咪唑基甲基)亚氨基甲基膦酸{bbimpH_2,(C7H5N2)CH2]2NCH2PO3H2}的2个镍化合物Ni2(bbimp)2(4,4′-bipy)(H2O)2·2H2O(1)和Ni2(bbimp)2(H2O)2]Ni(bbimp)(H2O)2]2·4H2O(2)。化合物1是4,4′-联吡啶作为桥连配体的中性双核结构。化合物2含有1个中性的Ni2(bbimp)2(H2O)2]双核分子与2个中性的Ni(bbimp)(H2O)2]单核分子。双核分子单元中的2个Ni!离子被2个膦酸氧桥连。在化合物2中,膦酸氧桥连的2个Ni!离子之间存在铁磁性相互作用。

Structures and Magnetic Properties of Dimeric Nickel Phosphonates Based on Bis(benzimidazol-2-ylmethyl)imino Methylenephosphonate: Ni2(bbimp)2(4,4'-bipy)(H2O)2·2H2O and [Ni2(bbimp)2(H2O)2][Ni(bbimp)(H2O)2]2·4H2O

This paper reports two nickel phosphonates Ni2(bbimp)2(4,4'-bipy)(H2O)2· 2H2O (1) and Ni2(bbimp)2(H2O)2]Ni(bbimp)(H2O)2]2·4H2O (2) based on bis(benzimidazol-2-ylmethyl)imino methylenephosphonic acid {bbimpH2,(C7H5N2)CH2]2NCH2PO3H2}. Compound 1 has a neutral dinuclear structure in which 4,4'-bipy serves as a bridging ligand. While in compound 2, neutral dimers of Ni2(bbimp)2(H2O)2], where the Ni(Ⅱ) ions are doubly bridged by phosphonate oxygen atoms, are aggregated with the mononuclear species of Ni(bbimp)(H2O)2]. Ferromagnetic interactions are mediated between the Ni(Ⅱ) ions through the phosphonate oxygen in compound 2. CCDC: 644282,1; 644283, 2.