Abstract
The four-strand and potentially N2O2-donor ligand 2,3-endo,endo-bis(aminomethyl)-5,6-endo,endo-bis(hydroxymethyl)bicyclo[2.2.1]heptane (L1), a close analogue of the known tetraalcohol 2,3,5,6-endo,endo,endo,endo-tetrakis(hydroxymethyl)bicyclo[2.2.1]heptane (L2), has been prepared via a multi-step synthesis and isolated as the copper(II) complex [Cu(L1)2](ClO4)2. An ESI-MS study of the complex and metal ion exchange with other transition metal ions (Fe2+, Co2+, Ni2+, Mn2+ or Zn2+) indicates that 1:1 complexes form readily. Apparently special stability for the Ni2+ species observed in the ESI-MS study suggests strong encapsulation of this ion.
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