X-ray analyses, spectroscopic and magnetic properties of [Cu4(succinato)(tpmc)2](ClO4)6·2C2H5OH·4H2O and [Cu2(C6H5COO)tpmc](ClO4)3·0.5CH3OH·0.5H2O complexes

New Cu (II) and Co(II) octaazamacrocyclic complexes with 2-amino-3-phenyl-propanoic acid

“…20 X-Ray structure analyses 16 of these complexes confirmed a coordination number 5 and the chromophore CuN 4 O, which are also supposed for complex 1. In addition, in UV part of the spectra, very intensive dented bands at 220-305 nm (ε from 4700 to 13596 L mol -1 cm -1 ) could be ascribed to charge transfer (CT) transitions.…”

“…[16][17][18][19][20][21][22] EXPERIMENTAL Metal-organic perchlorate salts must be handled with caution! Since they contain both oxidizing and reducing groups and metal ions are sometimes effective catalysts, serious explosions are possible!…”

Synthesis, characterization, and in vitro antiproliferative and antibacterial studies of tetraazamacrocyclic complexes of Co(II) and Cu(II) with pyromellitic acid

“…For this reason, the structure of the complex is proposed based on spectroscopic and TG/DTA measurements and by comparison of the obtained data with some of the aromatic carboxylate complexes previously described. For some of them the structure was confirmed by X-ray analysis [18,35].…”

Adsorption of water induces a reversible structural phase transition and colour change in new nickel(ii) macrocyclic complexes forming flexible supramolecular networks

“…These interactions, summarized in table 2, correspond to hydrogen bonds of the type D2 2 (8), D2 2 (9) and R2 2 (8). 34 An additional representation of the crystal lattice of compound 2 is shown in figure S6, where the molecules involved in the hydrogen bonding are emphasised in order to get a better perspective of these supramolecular interactions.…”

“…Tpmc is a macrocyclic ligand well known for its ability to form stable complexes with transition metals in lower oxidation states, e.g., copper (II), cobalt (II) and nickel (II), among others. [6][7][8][9][10] In these binuclear complexes, the metal ion remained exocoordinated from the macrocycle, where tpmc can adopt either a chair or a boat conformation depending on the metal ion and the nature (mono or polydentate) of a secondary ligand bound to the metal centers. 6,7 Figure 1 shows the tetraazamacrocycle tpmc and its conformational structures adopted in binuclear compounds.…”