Cleavage of ferrocenylbutadiynyl on a rhenium-gold cluster: Synthesis and molecular structure of Re4(AuPPh3)(μ4-C2)(μ3-C2Fc)(NCMe)(CO)13

► New gold-rhenium clusters 4 and 5 were synthesized by the reaction of Au(PPh3)(C4Fc) with Re2(CO)8(NCMe)2. ► Formation of cluster 5 is accompanied by the cleavage of the С-С bond of the parent butadiynyl ligand. ► X-ray structure of gold-rhenium clusters 4 and 5. ► Cluster 5 contains two moieties, dicarbide μ4-C2 and alkynyl μ3-C2Fc.