Bis(silylenyl)‐ and Bis(germylenyl)‐Substituted Ferrocenes: Synthesis, Structure, and Catalytic Applications of Bidentate Silicon(II)–Cobalt Complexes

Strong bite: The two respective SiII and GeII centers in ferrocene-containing bis(silylene) and bis(germylene) ligands 1 can serve as excellent σ donors, as shown in the formation of Co complexes 2 (see scheme, Cp=η5-cyclopentadienyl). Unexpectedly, only the bis(silylene)–Co complex 2 is a precatalyst for the [2+2+2] cycloaddition of phenylacetylene and MeCN, possibly because of a stronger coordination of the GeII donor centers to Co. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.