The First Earlier Transition Metal Alkynyl Cubane Cluster Mn4C4

While the coordination chemistry of monometallic complexes and the surface properties of extended metal particles are well understood, the control of metal nanocluster formation has remained challenging. The isolation of discrete metal clusters constitutes an especially rare snapshot at the nanoscale of cluster growth. This work reports the synthesis and full characterization of the first early‐transition metal alkynyl cubane and the first μ3‐alkynyl‐Mn3 motif.

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