[3]-Cryptates: metal cation inclusion complexes with a macrotricyclic ligand

Cryptates XXIV: Structure and stability of mononuclear and binuclear cation inclusion complexes of cylindrical macrotricyclic ligands

“…Because of the nature of the binding sites present in compounds 1-3 (0 and N atoms) the results concern mainly alkali and alkaline-earth cations (AC's and AEC's). The properties of compound 4 [7] [I21 and of a chiral macrotricyclic ligand [9] have been described earlier. Formation and structure of metal cation complexes of the macrotricyclic ligands 1,2,3.…”

Coordination des cations alcalino-terreux dans leurs complexes avec des molécules macrobicycliques. I. Structure cristalline et moléculaire du cryptate de calcium C18H36N2O6.CaBr2.3H2O

“…Dans les cryptates, un ou plusieurs ions m6talliques sont engag6s dans la cavit6 mol6culaire d'un systbme macrobicyclique (Dietrich, Lehn & Sauvage, 1969;Cheney, Lehn, Sauvage & Stubbs, 1972). Afin de pouvoir 6tudier la coordination des ions m6talliques dans ces compos6s, ainsi que les principaux facteurs responsables de la stabilit6 de ces complexes et de ia s61ectivit6 que manifestent ces coordinats bicycliques vis4t-vis de divers ions m6talliques, nous avons effectu6 une 6tude structurale d'une s6rie de complexes avec des cations monovalents (alcalins, Ag +, TI +) et bivalents (alcalino-terreux, Pb z+) (Moras, Metz & Weiss, 1973;Metz, Moras & Weiss, 1973a).…”

Synthesis and characterization of novel supercryptands-fused porphyrazines

“…Since the first cyclindrical [21,22] or spherical [23] macrotricylic ligands were reported by Lehn and co-workers, hundreds of macropolycyclic compounds with unusual shapes have been prepared and their properties have been investigated [24][25][26]. A very active current research activity in this area has led to the development of numerous procedures for effecting macrocyclization such as template effects and high dilution techniques, thus giving access to a great number of new macrocycles.…”

“…In addition, the attachment of oxacrown [8], azacrown or polyaza-polythia macrocycles to porphyrazine has received considerable attention since they allow for cation selectivity and complex stability to be enhanced through changing the numbers and types of macrocycle donors as well as the solubility of porphyrazines [9][10][11][12][13][14]. Lastly, being isoelectronic in terms of p electrons with the PcH 2 skeleton, these types of polynucleating macrocyclic compounds are promising new materials with potential applications in different fields such as electron transfer [15], magnetic interactions [16], optical phenomena [17], excited-state reactivity [18], mixed valency [19], and ionophoric activity [20].Since the first cyclindrical [21,22] or spherical [23] macrotricylic ligands were reported by Lehn and co-workers, hundreds of macropolycyclic compounds with unusual shapes have been prepared and their properties have been investigated [24][25][26]. A very active current research activity in this area has led to the development of numerous procedures for effecting macrocyclization such as template effects and high dilution techniques, thus giving access to a great number of new macrocycles.…”