Two one-dimensional (1D) manganese complexes, [Mn 2(naphtmen) 2(L)](ClO 4)·2Et 2O·2MeOH· H 2O (1) and [Mn 2(naphtmen) 2(HL)](ClO 4) 2·MeOH (2), were synthesized by using a bridging ligand with a nucleobase moiety, 6-amino-9-β-carboxyethylpurine, and a salen-type manganese(III) dinuclear complex, [Mn 2(naphtmen) 2(H 2O) 2](ClO 4) 2 (naphtmen 2- = N,N′-(1,1,2,2-tetramethylethylene) bis(naphthylideneiminato) dianion). In 1 and 2, the carboxylate-bridged Mn III dinuclear units are alternately linked by two kinds of weak Mn⋯O interactions into 1D chains. As a result, canted antiferromagnetic and ferromagnetic interactions are alternately present along the chains, leading to a 1D chain with non-cancellation of anisotropic spins. Since the chains connected via H-bonds between nucleobase moieties are magnetically isolated, both 1 and 2 act as single-chain magnets (SCMs). More importantly, this result shows the smaller canting angles hinder long-range ordering in favor of SCM dynamics.