Reactivity of the dodecahydro-closo-dodecaborate anion in zinc(II) and cadmium(II) complexation at the presence of azaheterocyclic ligands

• Published in: Inorganica Chimica Acta 2021-11, Vol.527, p.120587, Article 120587
• Main Authors: Korolenko, Svetlana E., Kubasov, Alexey S., Goeva, Lyudmila V., Avdeeva, Varvara V., Malinina, Elena A., Kuznetsov, Nikolay T.
• Format: Article
• Language: English
• Subjects: Anions; Boron clusters; Cadmium; Complexation; Coordination compounds; Ligands; Mixed-ligand complexes; Process parameters; X-ray diffraction; Zinc
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2021.120587

[Display omitted] •Cd(II) and Zn(II) complexation with the [B12H12]2– anion and ligands L have been studied.•2,2′-Bipyridyl, 2,2′-bipyridylamine, and 1,10-phenanthroline have been used as ligands L.•Complexes with the inner-sphere and outer-sphere boron clusters have been isolated.•First cadmium(II) complex with the coordinated [B12H12]2– anion has been isolated. The process of zinc(II) and cadmium(II) complexation with the dodecahydro-closo-dodecaborate anion in the presence of azaheterocyclic ligands L (L = bipy, bpa, phen) has been studied. A significant influence of the process parameters (the nature of the metal and azaheterocyclic ligands, the source of the metal and dodecahydro-closo-dodecaborate anion) on the composition and structure of the resulting compounds has been established. Complex [Cd(DMF)6][B12H12] has been found to be used as precursor for the synthesis of mixed-ligand complexes with the coordinated [B12H12]2– anion. The first example of a mixed-ligand binuclear cadmium(II) complex [Cd(bpa)2[μ-B12H12]]2 with the dodecahydro-closo-dodecaborate anion coordinated through a multicenter M−H(B) bond has been obtained and structurally characterized.