Heptanuclear trigonal prismatic clusters

Heptanuclear Trigonal Prismatic Clusters Stabilized by Monodentate Imidazole Ligand... 

Scheme 4 Formation of the heptanuclear trigonal prismatic clusters 17-22...

Fig. 18 Heptanuclear trigonal prismatic clusters with amino acids as ligands...

Fig. 19 Possible structure of the mother species I,nNifi(gly)fi(p3 0n)3(n20)fi( j.2 OH2 )3 ]61 an

The versatile binding modes of the Cu2+ ion with coordination number from four to six due to Jahn-Teller distortion is one of the important reasons for the diverse structures of the Cu-Ln amino acid complexes. In contrast, other transition metal ions prefer the octahedral mode. For the divalent ions Co2+, Ni2+, and Zn2+, only two distinct structures were observed one is a heptanuclear octahedral [LnM6] cluster compound, and the other is also heptanuclear but with a trigonal-prismatic structure. 

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