Company, Anna published the artcileStructural and Kinetic Study of Reversible CO2 Fixation by Dicopper Macrocyclic Complexes. From Intramolecular Binding to Self-Assembly of Molecular Boxes, SDS of cas: 17351-61-0, the publication is Inorganic Chemistry (2007), 46(22), 9098-9110, database is CAplus and MEDLINE.
A study of the reversible CO2 fixation by macrocyclic dicopper complexes is described. The dicopper macrocyclic complexes [Cu2(OH)2(Me2p)](CF3SO3)2, 1(CF3SO3)2, and [Cu2(¦Ì-OH)2(Me2m)](CF3SO3)2, 2(CF3SO3)2, containing terminally bound and bridging hydroxide ligands, resp., and with macrocycle ligand I (Z = m-phenylene (Me2m), p-phenylene (Me2p)) promote reversible inter- and intramol. CO2 fixation that gave the carbonate complexes [{Cu2(Me2p)}2(¦Ì-CO3)2](CF3SO3)4, 4(CF3SO3)4, and [Cu2(¦Ì-CO3)(Me2m)](CF3SO3)2, 5(CF3SO3)2. Under a N2 atmosphere the complexes evolve CO2 and revert to the starting hydroxo complexes 1(CF3SO3)2 and 2(CF3SO3)2, a reaction the rate of which linearly depends on [H2O]. In the presence of H2O, attempts to crystallize 5(CF3SO3)2 afford [{Cu2(Me2m)(H2O)}2(¦Ì-CO3)2](CF3SO3)4, 6(CF3SO3)4, which appears to rapidly convert to 5(CF3SO3)2 in MeCN solution [Cu2(OH)2(H3m)]2+, 7, which contains a larger macrocyclic ligand II (H3m), irreversibly reacts with atm. CO2 to generate cage-like [{Cu2(H3m)}2(¦Ì-CO3)2](ClO4)4, 8(ClO4)4. However, addition of 1 equiv of HClO4 per Cu generates [Cu2(H3m)(MeCN)4]4+ (3), and subsequent addition of Et3N under air reassembles 8. The carbonate complexes 4(CF3SO3)4, 5(CF3SO3)2, 6(CF3SO3)4, and 8(ClO4)4 were characterized in the solid state by x-ray crystallog. This anal. reveals that 4(CF3SO3)4, 6(CF3SO3)4, and 8(ClO4)4 consist of self-assembled mol. boxes containing two macrocyclic dicopper complexes, bridged by CO32- ligands. The bridging mode of the carbonate ligand is anti-anti-¦Ì-¦Ç1:¦Ç1 in 4(CF3SO3)4, anti-anti-¦Ì-¦Ç2:¦Ç1 in 6(CF3SO3)4 and anti-anti-¦Ì-¦Ç2:¦Ç2 in 5(CF3SO3)2 and 8(ClO4)4. Magnetic susceptibility measurements on 4(CF3SO3)4, 6(CF3SO3)4, and 8(ClO4)4 indicate that the carbonate ligands mediate antiferromagnetic coupling between each pair of bridged CuII ions (J = -23.1, -108.3, and -163.4 cm-1, resp., H = -JS1S2). Detailed kinetic analyses of the reaction between CO2 and the macrocyclic complexes 1(CF3SO3)2 and 2(CF3SO3)2 suggest that it is actually hydrogen carbonate formed in aqueous solution on dissolving CO2 that is responsible for the observed formation of the different carbonate complexes controlled by the binding mode of the hydroxy ligands. CO2 fixation can be used as an on/off switch for the reversible self-assembly of supramol. structures based on macrocyclic dicopper complexes.
Inorganic Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, SDS of cas: 17351-61-0.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia