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Updated: Jan 6, 2026
Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
Published on: October 3, 2014
Di-tert-butyldiphosphatetrahedrane: Catalytic Synthesis of the Elusive Phosphaalkyne Dimer
Gabriele Hierlmeier1, Peter Coburger1, Michael Bodensteiner1
1University of Regensburg, Institute of Inorganic Chemistry, 93040, Regensburg, Germany.
Abstract:
While tetrahedranes as a family are scarce, neutral heteroatomic species are all but unknown, with the only reported example being AsP3 . Herein, we describe the isolation of a neutral heteroatomic X2 Y2 molecular tetrahedron (X, Y=p-block elements), which also is the long-sought-after free phosphaalkyne dimer. Di-tert-butyldiphosphatetrahedrane, (tBuCP)2 , is formed from the monomer tBuCP in a nickel-catalyzed dimerization reaction using [(NHC)Ni(CO)3 ] (NHC=1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene (IMes) and 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene (IPr)). Single-crystal X-ray structure determination of a silver(I) complex confirms the structure of (tBuCP)2 . The influence of the N-heterocyclic carbene ligand on the catalytic reaction was investigated, and a mechanism was elucidated using a combination of synthetic and kinetic studies and quantum chemical calculations.
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