title: Metal-Free Activation of Hydrogen, Carbon Dioxide, and Ammonia by the Open-Shell Singlet Biradicaloid [P(μ-NTer)]2.
abstract: The Group 15 open-shell singlet biradicaloid [P(μ-NTer)]2 (Ter=2,6-bis(2,4,6-trimethylphenyl)phenyl) was utilized in the activation of stable small molecules. Fast reactions with H2 , CO2 , and NH3 were observed. Dihydrogen easily added to [P(μ-NTer)]2  , yielding [HP(μ-NTer)]2 under ambient conditions whereas reversible release of molecular hydrogen was observed at slightly elevated temperatures (T>60 °C). As [P(μ-NTer)]2 is a species with phosphorus in the unusual formal oxidation state +II, it is capable of reducing carbon dioxide to afford a zwitterionic compound, [OP(μ-NTer)2 P], and carbon monoxide. The reaction of [P(μ-NTer)]2 with ammonia led to the formation of an azadiphosphiridine after rearrangements of the central P2 N2 heterocycle.
authors: Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, OX1 3TA, Oxford, UK.
authors: Alexander
authors: A
authors: Hinz
authors: Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059, Rostock, Germany. axel.schulz@uni-rostock.de.|Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany. axel.schulz@uni-rostock.de.
authors: Axel
authors: 0000-0001-9060-7065
authors: A
authors: Schulz
authors: Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059, Rostock, Germany.
authors: Alexander
authors: A
authors: Villinger
keywords: activation; ammonia; biradicaloids; carbon dioxide; dihydrogen