Abstract A series of six N-benzoyl-thiocarbamic-O-alkylesters (R [DOUBLE BOND] Me, Et, i- Pr, Benzyl, n-Hex, n-Dodec; 1–6) has been prepared and characterized. They are weak monoprotic acids. The compounds behave as fairly stable and versatile bidentate (O, S)- chelating ligands towards multivalent metal ions eg Ni (II), Cu (II), Pb (II) the stability constants of which have been determined in 75 vol% dioxane/water. The molecular ...