Study of protonation and Zn(II), Cd(II), Cu(II) and Mn(II) complexation with a glutamic acid N-pyrimidine derivative: Crystal structure of a neutral Cd(II) complex of the bianionic ligand

Aminoacids N-5-nitroso-pyrimidine derivatives behave as bifunctional ligands whose pyrimidine residue reveals bipolar nature that favours adsorption at the arene centres of graphitic activated carbon and their behaviour as versatile ligands. Water reaction of N-2-(4-amino-1,6-dihydro-1-methyl-5-nitroso-6-oxopyrimidinyl)-glutamic acid with Cd2+ yields a molecular layered compound with {[Cd(HL)H2O] · 3H2O}n units containing three different coordination modes (1η, μ−2η and μ−3η).