10 research outputs found
An expanded cavity hexaamine cage for copper(II)
Get PDFThe crystal structure of the bicyclic hexaamine complex [Cu(fac-Me-5-tricosane-N-6)](ClO4)(2) center dot H2O (fac-Me-5-tricosane-N-6 = facial-1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7] tricosane) at 100 K defines an apparently tetragonally compressed octahedral geometry, which is attributed to a combination of dynamic interconversion and static disorder between two tetragonally elongated structures sharing a common short axis. This structure is fluxional at 60 K and above as shown by EPR spectroscopy. Aqueous cyclic voltammetry reveals that a remarkably stable Cu-I form of the complex is stabilised by the encapsulating nature of the expanded cage ligand
Octahedral and trigonal prismatic structure preferences in a bicyclic hexaamine cage for zinc(ii), cadmium(ii) and mercury(ii) ions
No full textNew synthetic routes to hexa-aza cages using cobalt(III) tris(1,2-diamine) templates
No full textA synthetic route to form hexa-aza macropentacyclic Cobalt(III) complexes was discussed. The encapsulation reaction was carried out using a non-aqueous synthetic methodology in which formaldehyde derived from solid polymer was used to generate coordinated methamines by reaction with deprotonated primary amines of the template. The analysis showed that the cage complex retains the δ-absolute configuration of the template iron
An expanded cavity hexaamine cage for copper(II)
No full textThe crystal structure of the bicyclic hexaamine complex [Cu(fac-Me 5 -tricosane-N 6 )](ClO 4 ) 2 ·H 2 O (fac-Me 5 -tricosane-N 6 = facial-1, 5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosane) at 100 K defines an apparently tetragonally compressed octahedral geometry, which is attributed to a combination of dynamic interconversion and static disorder between two tetragonally elongated structures sharing a common short axis. This structure is fluxional at 60 K and above as shown by EPR spectroscopy. Aqueous cyclic voltammetry reveals that a remarkably stable Cu I form of the complex is stabilised by the encapsulating nature of the expanded cage ligand
Precursors to New Molecular Tube Ligands. 1. Double-Capped Trinuclear Cobalt Complexes of Aminoethanethiol
No full textSulfur-and Carbon-Bonded Forms of the Cobalt(III) Complex with the Ligands 2-Aminoethyl 3-Aminopropyl Sulfide and 1,1,1-Tris(aminomethyl)ethane
No full textOctahedral and trigonal prismatic structure preferences in a bicyclic hexaamine cage for zinc(II), cadmium(II) and mercury(II) ions
No full textIsomers of the bis(1,4,7-triazacyclodecane)cobalt(III) ion, and the occurrence of higher cyclic and non-cyclic amines in the Richman—Atkins synthesis for cyclic amines
No full textFour-component intergrowth structures of the metal-ion-cage complexes fac-(1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]-tricosane)MII diperchlorate hydrate, [M(C22H48N6)](ClO4)2.xH2O, M = Ni, Zn
No full textThe crystal structures of (1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosane-K 6N,N′,N″,N‴,N″″,N‴″) nickel(II) diperchlorate-x(water) (x = 0.530), [Ni(C22H48N6)](ClO4) 2.0.530H2O, and (1,5,9,13,20-pentamethyl-3,7,11,15,
Gallium-68 complex of a macrobicyclic cage amine chelator tethered to two integrin-targeting peptides for diagnostic tumor imaging
No full textMichelle T. Ma, Oliver C. Neels, Delphine Denoyer, Peter Roselt, John A. Karas, Denis B. Scanlon, Jonathan M. White, Rodney J. Hicks, and Paul S. Donnell
