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- W2950498490 abstract "A new 7,16-bis(quinolin-8-ylmethyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane ligand, L, has been prepared and its crystal structure reported. In addition, the structure of the protonated ligand H2L has been determined. H2L is of interest because of interatomic interactions between the ligand and perchlorate ions. The mononuclear Ba(II) (BaL), and dinuclear Cu(II) (Cu2L) complexes of L have been prepared and their crystal structures determined. Stability constants and other thermodynamic data valid in methanol at 23 or 25° for these and several other complexes of L have been obtained. Among the metal ions studied, L forms the most stable complex with Ba2+. In addition, L selectively binds Cu2+ over Ni2+ by about 3 orders of magnitude. Some of the complexes have been studied using nmr and uv-vis spectroscopic techniques. Crystal data are given for L, space group, P21c, a = 8.8325(14) A, b = 13.808(3) A, c = 13.310(3) A; β = 94.72(2)° Z=2, R = 0.0727; for H2L, space group, P21/c, a = 14.685(3) A, b = 15.035(6) A, c = 17.369(4) A, β = 90.366(12)°, Z = 4, R = 0.0781; for BaL, space group, Pbcn, a = 17.314(3) A, b = 9.539(2) A, c = 22.081(3) A, Z = 4, R = 0.0354; and for Cu2L, space group, Cc, a = 19.762(2) A, b = 14.413(2) A, c = 14.935(2) A, β = 98.753(12)°, Z = 4, R = 0.0564. Cu2+ forms a hydroxo-bridged dinuclear complex with L while Ba2+ forms a mononuclear complex with L in which its two side arms are not involved in complexation." @default.
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- W2950498490 date "2010-05-25" @default.
- W2950498490 modified "2023-09-24" @default.
- W2950498490 title "ChemInform Abstract: A New Diaza-18-crown-6 Ligand Containing Two Quinolin-8-ylmethyl Side Arms: Crystal Structures and Characterization of the Ligand, the Protonated Ligand and Its Mononuclear Barium(II) and Dinuclear Copper(II) Complexes." @default.
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- W2950498490 doi "https://doi.org/10.1002/chin.200126171" @default.
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