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Chromium(III) Complexes with N , N ′-Ethylenediaminediacetic Acid

1969; Oxford University Press; Volume: 42; Issue: 6 Linguagem: Inglês

10.1246/bcsj.42.1569

1348-0634

Yuki Fujii, Eishin Kyuno, Ryokichi Tsuchiya,

Metal-Organic Frameworks: Synthesis and Applications

Abstract The following chromium(III) complexes containing N,N′-ethylenediaminediacetic acid (EDDA) were newly prepared: [Cr(Hedda)2]Cl·3H2O (red) (I), [Cr2(OH)2(edda)2]·6H2O (purple) (II), H[Cr(edda)(ox)]·2H2O (purple) (III), [Cr(edda)(dip)]I·5H2O (orange) (IV), K[Cr(NCS)2(edda)]·H2O (reddish purple) (V) and [Cr(Cl)(edda)(H2O)]·3H2O (bluish purple) (VI), where edda, ox and dip are the abbreviations of the N,N′-ethylenediaminediacetate and oxalate anions, and α,α′-dipyridyl respectively. On the basis of the experimental results, it was concluded that EDDA is coordinated as a terdentate ligand in complex I and as a quadridentate in the other complexes prepared in the present work. Furthermore, it was also suggested that complex II has a dimer structure and complex V has trans configuration (with respect to the coordinated carboxylate oxygen).