A one-dimensional chain of interconnected single-molecule magnets (SMMs) is obtained that consists of [Mn-4(hMP)(6)](4+) units bridged by chloride ions. Slow magnetization relaxation is evident in the AC susceptibility data and in magnetization hysteresis measurements for [Mn-4(hmp)(6)Cl-2]n(CIO4)(2n). The magnetization hysteresis loops for this complex are similar to those for an SMM and show significant coercive field and steps at regular magnetic intervals. Spin-canted antiferromagnetic coupling due to misalignment of easy axes of neighboring Mn-4 units is also observed for this complex.