Self-assembly of an achiral [Cu(L)] complex produced a homochiralhelicalchain [Cu(L)]3·2H2O (1) (L = 2-dimethylaminoethyl(oxamato)). Interestingly, complex 1 obtained in our laboratory exhibits only a left-handed helicalchain without any chiral source. Single-crystal X-ray analysis revealed the absolute structure and homochirality of its helicalchain structure in the space group of P32. Solid-state