Di-tert-butyldiphosphatetrahedrane as a Source of 1,2-Diphosphacyclobutadiene Ligands

Gabriele Hierlmeier, Peter Coburger, Daniel Scott, Thomas Maier, Stefan Pelties, Robert Wolf, Daniel Pividori, Karsten Meyer, Nicolaas van Leest, Bas de Bruin

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7 Citations (SciVal)


Reactions of di-tert-butyldiphosphatetrahedrane (1) with cycloocta-1,5-diene- or anthracene-stabilised metalate anions of iron and cobalt consistently afford complexes of the rarely encountered 1,2-diphosphacyclobutadiene ligand, which have previously been very challenging synthetic targets. The subsequent reactivity of 1,2-diphosphacyclobutadiene cobaltates toward various electrophiles has also been investigated and is compared to reactions of related 1,3-diphosphacyclobutadiene complexes. The results highlight the distinct reactivity of such isomeric species, showing that the 1,2-isomers can act as precursors for previously unknown triphospholium ligands. The electronic structures of the new complexes were investigated by several methods, including NMR, EPR and Mößbauer spectroscopies as well as quantum chemical calculations.
Original languageEnglish
Pages (from-to)14936-14946
JournalChemistry - A European Journal
Issue number60
Early online date27 Sept 2021
Publication statusPublished - 26 Oct 2021


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