Pentacoordinated manganese complexes as biomimetic catalysts for asymmetric epoxidations with hydrogen peroxide

Synthesis and Characterization of Cobalt(III) Octahedral Complexes with Flexible Salpn Schiff Base in Solution. Structural Dependence of the Complexes on the Nature of Schiff Base and Axial Ligands

“…Many studies initially focus on simple Schiff base ligand such as salophen, salen and acacen (n = 2) Scheme 1 1,4,5,10,11 but interest quickly shift to more intricate species which have extra functional groups, side chains and more methylene groups in the amine backbone.…”

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For a long time tetradentate Schiff base complexes of transition metal ions have attracted many researchers interest in the field of coordination chemistry.1-5 Co(III) complexes of Schiff base are an important class of coordination compound not only because of them being interesting B 12 models and oxygen carriers but also due to their interesting magnetic properties, spectroscopic characteristics and the interaction of metal-to-ligand bonds.

4-9Many studies initially focus on simple Schiff base ligand such as salophen, salen and acacen (n = 2) Scheme 1 1,4,5,10,11 but interest quickly shift to more intricate species which have extra functional groups, side chains and more methylene groups in the amine backbone.12-15 A number of structural studies on the effect of the number of CH 2 groups between the two imine moieties in VO

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“…[1][2][3][4][5] Co(III) complexes of Schiff base are an important class of coordination compound not only because of them being interesting B 12 models and oxygen carriers but also due to their interesting magnetic properties, spectroscopic characteristics and the interaction of metal-to-ligand bonds. [4][5][6][7][8][9] Many studies initially focus on simple Schiff base ligand such as salophen, salen and acacen (n = 2) Scheme 1 1,4,5,10,11 but interest quickly shift to more intricate species which have extra functional groups, side chains and more methylene groups in the amine backbone.…”

“…[1][2][3][4][5] Co(III) complexes of Schiff base are an important class of coordination compound not only because of them being interesting B 12 models and oxygen carriers but also due to their interesting magnetic properties, spectroscopic characteristics and the interaction of metal-to-ligand bonds. [4][5][6][7][8][9] Many studies initially focus on simple Schiff base ligand such as salophen, salen and acacen (n = 2) Scheme 1 1,4,5,10,11 but interest quickly shift to more intricate species which have extra functional groups, side chains and more methylene groups in the amine backbone. [12][13][14][15] A number of structural studies on the effect of the number of CH 2 groups between the two imine moieties in VO 2+ , Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ complexes [16][17][18][19][20][21][22] of tetradentate Schiff bases derived from salicylaldehyde and a variety of diamines (1:2 ratio) have been carried out previously.…”

Metallation of tetradentate N2O2 Schiff base with Mn(II), Co(II), Cu(II) and Zn(II): synthesis, characterization and formation constants measurement

“…Schiff base complexes are once again topical in connection with self-assembling cluster complexes [9][10][11][12][13][14][15]. Schiff base complexes are known to be biologically important and serve as catalysts in various chemical and photochemical reactions [16][17][18][19][20].…”