A unique example of a three component cocrystal of metal complexes

Syntheses, structures and catecholase activity of two cobalt(III) complexes derived from N,N′-ethylenebis(3-ethoxysalicylaldiimine): A special host–guest system from a special ligand

“…It is well known now that O(phenoxo) 2 O(ethoxy) 2 compartment in copper(II)/nickel(II) systems derived from H 2 L OEt ligands can accommodate a noncoordinated guest species such as water, aquated proton, ammonium ion and diprotonated diamine [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In contrast, it is quite unlikely that a noncoordinated guest species (water, oxonium ion, etc.)…”

“…Many mono/di/oligonuclear metal complexes have been reported from the following types of acyclic Schiff base ligands: (i) Single-compartment ligands (H 2 L Single ), obtained on [2+1] condensation of salicylaldehyde/2-hydroxyacetophenone/2-hydroxypropiophenone and a diamine [1][2][3][4][5][6][7][8][9][10][11]; Double-compartment ligands H 2 L OMe [1,[12][13][14][15][16][17][18] and H 2 L OEt [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] ligands, obtained on [2+1] condensation of 3-methoxysalicylaldehyde and 3-ethoxysalicylaldehyde, respectively, and a diamine. It has been established that H 2 L OEt ligands are something special because its O(phenoxo) 2 O(ethoxy) 2 compartment is strongly potential to act as a hydrogen bond acceptor with hydrogen bond donors such as water [1,[19][20][21][22][23][24][25]…”

“…It is worth mentioning that a number of the metal compounds derived from H 2 L OEt ligands are weak interaction directed selfassemblies [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] and thus lie in the domain of general perspectives of crystal engineering [36][37][38][39]. In spite of our extensive works on H 2 L OEt ligands [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] and in spite of our observation of a number of interesting self-assemblies over a decade, we have been hopeful that some more new types of weak interaction directed systems can be stabilized with this family of special ligands and therefore we are yet in the process of continuous development.…”

“…The metal complexes derived from H 2 L OEt ligands include mononuclear host-guest systems, dinuclear systems, double/triple/quadruple-decker compounds, supramolecular dimers and finite/infinite cocrystals [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. It is worth mentioning that a number of the metal compounds derived from H 2 L OEt ligands are weak interaction directed selfassemblies [1,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] and thus lie in the domain of general perspectives of crystal engineering [36][37][38][39]. In spite of our extensive works on H 2 L OEt ligands [1,[19][20][21][22][23][24]…”

Metal(II) Complexes of Compartmental Polynuclear Schiff Bases Containing Phenolate and Alkoxy Groups

“…Large number of dinuclear metal complexes were formed through the incorporation of metal ions into the two coordination sites N 2 -O 2 and O 2 -O 2 including the two alkoxy groups, especially with the bi-compartmental Schiff bases (H 2 L OR -en, H 2 L OR -tn, H 2 L OR -dmtn) derived from aliphatic diamines [5,6,26,27,33,34,39,41,42,[64][65][66][67][68][69][70][71][72][73][74][75][76][77][78]. Other di-and poly-nuclear complexes were obtained through assembly of the Schiff bases or through bridging ligands [29,32,34,[36][37][38]41,64,67,68,[78][79][80][81][82][83][84].…”