Oxygen-Containing 10-, 15-, and 20-Membered Macrocyclic Cobalt Complexes from Co2(CO)6-Bispropargylic Alcohol

Synthesis and Spectral Studies of Cobalt (II) and Nickel (II) Complexes with 18-membered Macrocyclic Ligand Derived from Malonodihydrazide

A series of 18-membered macrocyclic complexes of metal Ni(II) of the type [M(H2Cy )] have been synthesized and characterized on the basis of spectral, magnetic and conductivity studies. The macrocyclic ligands H 4 Cy1-4 (Fig. 1) are tetrabasic having four imido hydrogen but behave in a dibasic manner. Out of eight nitrogens, four imido and four imino, ligands utilize four imido nitrogens for sq...

GT32-B new 20-membered macrocyclic lactam antibiotic.

Nickel and cobalt complexes of 15 , 15 - disubstituted 1 , 4 , 7 , 10 , 13 - pentaazacyclohexadecane - 14 , 16 - dione ligands

The synthesis of the novel Co(III)(15,15-difluoro-1,4,7,10,13-pentaazacyclohexadecane-14,16dione) acetate complex from different cobalt sources is described. Furthermore, the corresponding nickel complex and its new analog with the 15-fluoro-15-methyl-1,4,7,10,13-pentaazacyclohexadecane-14,16dione ligand were studied in great detail including cyclic voltammetry and single crystal analyses of a ...

Synthesis, Characterization, and Reactivity of Cobalt ACHTUNGTRENNUNG(III)–Oxygen Complexes Bearing a Macrocyclic N-Tetramethylated Cyclam Ligand

Oxygen-coordinating metal species, such as metal–peroxo, –hydroperoxo, and –oxo complexes (Scheme 1), have been frequently invoked as reactive intermediates in the catalytic cycles of dioxygen activation by metalloenzymes, such as heme and nonheme iron monooxygenases and copper-containing enzymes. In biomimetic studies, synthetic analogues of these active oxygen intermediates have been intensiv...

Synthesis and spectral characterisation of hydrazone based 14-membered octaaza macrocyclic Ni(II) complexes

Schiff base condensation of benzil bis(hydrazone) with formaldehyde, acetone and benzaldehyde and its nickel(II) complexes were synthesised. Preparation of the free ligands was accomplished by refluxing benzil with hydrazine derivatives in 1:10 mole ratios in ethylene glycol. The spectral characterisation of hydrazone based 14-membered octaaza macrocyclic complexes of nickel(II) was undertaken....