Geometrically constrained square pyramidal phosphoranide

Solomon Volodarsky, Irina Malahov, Deependra Bawari, Mohand Diab, Naveen Malik, Boris Tumanskii, Roman Dobrovetsky*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Geometrical constriction of main group elements leading to a change in the reactivity of these main group centers has recently become an important tool in main group chemistry. A lot of focus on using this modern method is dedicated to group 15 elements and especially to phosphorus. In this work, we present the synthesis, isolation and preliminary reactivity study of the geometrically constrained, square pyramidal (SP) phosphoranide anion (1−). Unlike, trigonal bipyramidal (TBP) phosphoranides that were shown to react as nucleophiles while their redox chemistry was not reported, 1− reacts both as a nucleophile and reductant. The chemical oxidation of 1− leads to a P-P dimer (1-1) that is formed via the dimerization of unstable SP phosphoranyl radical (1˙), an unprecedented decay pathway for phosphoranyl radicals. Reaction of 1− with benzophenone leads via a single electron transfer (SET) to 1-OK and corresponding tetraphenyl epoxide (4).

Original languageEnglish
Pages (from-to)5957-5963
Number of pages7
JournalChemical Science
Issue number20
StatePublished - 27 Apr 2022


FundersFunder number
Ministry of Science, Technology and Space65692
United States-Israel Binational Science Foundation2018221
Israel Science Foundation237/18


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