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Molecular wires and switches are forecast to be the elemental building blocks for future electronic applications. Synthesizing 1D molecules and comprehensively understanding their electric characteristics has become one of the major focus areas of materials science. The growth of this research field has been encouraged by the discovery of a strong dependence of electron transport on the length, conjugation, conformation, and substituents of tailored molecules.[1, 2] While remarkable progress has been achieved during the past decade, most of the knowledge learned has been from conjugated organic molecules whose counterpart, organometallic molecular wires,[3–17] has been rarely explored. Herein we present quantitative measurements of singlemolecule conductance of 1D multinuclear metal strings ([MnL4 (NCS) 2], Mn= Cr3, Co3, Ni3, Cr5, Co5, Ni5, and Cr7; L= oligo-α-pyridylamine; Scheme 1).[3] The …