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Updated: Mar 8, 2026
08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
8.3K
Oxidation of Substituted Phosphanylboranes with Chalcogens
Christian Marquardt1, Oliver Hegen1, Tobias Kahoun1
1Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 25, 2017
Summary
Elemental chalcogens like sulfur, selenium, and tellurium were used to oxidize phosphanylboranes. This study reports the first neutral telluride-substituted phosphanylboranes, expanding inorganic chemistry.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
Background:
- Phosphanylboranes are versatile compounds with potential applications in catalysis and materials science.
- Oxidation reactions are crucial for modifying the properties and reactivity of organophosphorus compounds.
Purpose of the Study:
- To investigate the oxidation of phosphanylboranes using elemental chalcogens (sulfur, selenium, tellurium) and a peroxide oxygen source.
- To synthesize and characterize novel mono- and di-oxidized phosphanylborane derivatives.
- To explore the reactivity of phosphanylboranes towards further oxidation.
Main Methods:
- Oxidation of phosphanylboranes (Ph2P-BH2·NMe3 and tBuHP-BH2·NMe3) using S, Se, Te, and bis(trimethylsilyl)peroxide.
- Characterization of products using single crystal X-ray structure analysis, NMR, IR spectroscopy, and mass spectrometry.
- Further oxidation of tert-butyl derivative with O2, S8, and Se.
Main Results:
- Selective monooxidation of phosphanylboranes yielding Ph2P(X)-BH2·NMe3 and tBuHP(X)-BH2·NMe3 (X=O-Te) in good yields.
- Comprehensive characterization of the synthesized compounds.
- Successful synthesis of neutral Te-substituted phosphanylboranes, representing the first examples of their kind.
- Further oxidation of the tert-butyl derivative to form tBu(HX)P(X)-BH2·NMe3 (X=O, S, Se).
Conclusions:
- Elemental chalcogens are effective reagents for the selective oxidation of phosphanylboranes.
- The study presents the first neutral telluride-substituted phosphanylboranes.
- The findings expand the scope of phosphanylborane chemistry and offer new avenues for synthetic exploration.
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