Cyanide–Isocyanide Isomerism in CN‐Bridged Organometallic Complexes

The inertness of the organometallic building blocks makes it surprisingly easy to prepare the two isomeric forms of CN‐bridged heterodinuclear complexes like 1 a and 1 b . Compounds like these should contribute to the understanding of “molecular Prussian Blue”, dppe = 1,2‐bis(diphenylphosphano)ethane.\documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}$$[{\rm (CO)}_5{\rm Cr}(\mu\hbox{-CN}){\rm Fe(dppe)Cp}]\quad{\bf 1a}\qquad[{\rm (CO)}_5{\rm Cr}(\mu\hbox{-NC}){\rm Fe(dppe)Cp}]\quad{\bf 1b}$$\end{document}