Synthesis and X‐ray Crystal Structure of Bis[oxamide dioximato‐κ2N,N′](oxamide dioxime‐κ2N,N′)cobalt(III) Perchlorate Hexahydrate |
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| Authors: | Michel M Bélombé Prof Dr Justin Nenwa Peter Lönnecke Evamarie Hey‐Hawkins |
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| Institution: | 1. Inorganic Chemistry Department, University of Yaounde I, Yaounde, Cameroon;2. Institut für Anorganische Chemie, Universit?t Leipzig, Leipzig, Germany |
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| Abstract: | Co(OAc)2 reacts with oxamide dioxime (H2oxado) in water in the presence of ClO4– ions to produce Co(Hoxado)2(H2oxado)]ClO4 · 6H2O ( 1 ), where Hoxado– is the anion of H2oxado, derived from the deprotonation of one of the two hydroximinic groups, and in which oxidation of CoII to CoIII (in air) had occurred. 1 is the first example of a salt in which the cation, Co(H2oxado)3]3+, is doubly deprotonated to generate the chiral cation, Co(Hoxado)2(H2oxado)]+. The central cobalt cation is pseudo‐octahedrally coordinated by six nitrogen atoms. In the solid state, the complex cations form centro‐symmetric dimers via O–H ··· O bridges. The bulk structure is consolidated by an extended three‐dimensional network of O–H ··· O and N–H ··· O bridges that interconnect the ionic constituents and the water molecules. |
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| Keywords: | Coordination chemistry Cobalt Oxamide dioxime Structure elucidation |
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