Upon complexation with Pd(II) ion, desymmetrized chelating ligand, 6-methyl-2,2'-bipyridine (1), gives only anti Pd.(1)(2)(2+) complex. This regioselective complexation is applied to complementary multicomplexation of liner molecular strands: namely, a strand containing two methyl-substituted 2,2'-bipyridine units is selectively complexed on Pd(II) with its counterpart strand in which methyl groups are complementarily substituted.