New polynuclear compounds based on N-benzyliminodipropionic acid: solution studies, synthesis, and X-ray crystal structures

作者：Brana Emiliano; Quinone Delfina; Martinez Sebastian; Grassi Joaquin; Carrera Ignacio; Torres Julia; Gonzalez Platas Javier; Seoane Gustavo; Kremer Carlos; Mendoza Carolina^*

来源：Journal of Coordination Chemistry, 2016, 69(24): 3650-3663.

DOI：10.1080/00958972.2016.1239086

• Polynuclear complexes
• Cu(II)
• Ni(II)
• X-ray crystal structures
• N-Benzyliminodipropionate
• flexible ligand
• solution studies

Three new polynuclear compounds based on a dicarboxylic acid ligand are reported. In particular, two Cu(II) coordination compounds, [Cu-2(H2O)(6)(Hbzlidp)(2)](CF3SO3)(2)2H(2)O (1) and [Cu(NO3)(Hbzlidp)] (2) (bzlidp(2-)=N-benzyliminodipropionate anion), and a Ni(II) dinuclear compound, [Ni-2(H2O)(4)(bzlidp)(2)] (3), were synthesized and characterized by IR spectroscopy, elemental analysis and single crystal X-ray diffraction. Different structures were obtained depending on the reaction conditions. The structural analyses reveal that 1 was formed by dinuclear [Cu-2(H2O)(6)(Hbzlidp)(2)](2+) units built by two copper(II) ions joined through two Hbzlidp(-) ligands, while 2 was formed by pairs of Cu(II) centers bridged by four syn,syn carboxylate groups to generate paddle wheel units. The dinuclear copper units are arranged in a rhombus type grid, in a 2-D layer structure. In both cases, the N was protonated and not coordinated to the metal center. Compound 3 was formed by [Ni-2(H2O)(4)(bzlidp)(2)] neutral dinuclear units, with octahedral Ni(II) centers. Solution studies of the ligand-M(II) systems (M(II)=Mn, Co, Ni, Cu, Zn, Cd, and Pb) were also carried out.
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• 出版日期2016