Synthesis and X-ray crystal structures of iron(II) and manganese(II) complexes of unsubstituted and benzyl substituted cross-bridged tetraazamacrocycles

N,N′-diethyl and N-ethyl,N′-methyl glyoxal-bridged cyclams: synthesis, characterization, and bleaching activities of the corresponding Mn(II) complexes

“…The crystal structure confirms the expected geometry already found in other Mn(II) complexes containing this kind of ligand [2,5,6,18]. The Mn atom is hexa-coordinated and occupies the cavity of the tetradentate ligand, completing its coordination sphere with two chlorine atoms in a pseudo-octahedral geometry.…”

“…Glyoxal-bridged cyclam-based ligands (L-R,R 0 ) have attracted much interest [1][2][3][4][5][6][7][8][9] in the last decades, due to their ability to coordinate mid-late transition metals (Scheme 1).…”

The first structurally characterised copper(II) complexes of quino[7,8-h]quinoline ligands

“…The water molecules present in the initial metal salt reagents being the most likely proton source. This inherent competition between metal coordination and protonation of the ligand has been observed before for a related system [14]. The use of triethylamine as an auxiliary base did not hinder the formation of protonated 1a for the sulfate, acetate and chloride salts.…”

Discovery of Antischistosomal Drug Leads Based on Tetraazamacrocyclic Derivatives and Their Metal Complexes

“…The synthesis of some of the cross-bridged tetraazamacrocycle mono-and bisligands, precursors, and complexes (compounds 1 to 18) was conducted on the basis of methods described in the literature (29,33,34,39 Archibald, submitted for publication). The mono-and bisquinoline derivatives of macrocyclic polyamines (compounds 19 to 26) were synthesized and purified by chromatography and/or solvent crystallization according to the methods that we described earlier (22,30) and were recovered in moderate to good yields.…”