ChemInform Abstract: CONTRIBUTIONS TO THE CHEMISTRY OF PHOSPHORUS. 110. 1,2‐DI‐TERT‐BUTYLDIPHOSPHINE AND TERT‐BUTYLDIPHOSPHINE

Abstract

Die Hydrolyse des Dikaliumdiphosphids (I) bzw. die Methanolyse des Diphosphins (III) fuhren zu dem bisher unbekannten Diphosphin (II), das gegenüber Dispro‐ portionierungsreaktionen bemerkenswert beständig ist.

Zirconium-Catalyzed Alkene Hydrophosphination and Dehydrocoupling with an Air-Stable, Fluorescent Primary Phosphine

“…The P-H protons of 5 resonate at δ = 3.89 (J PH = 199 Hz), which is similar to other aryl-substituted secondary diphosphines (e.g., (p-TolPH) 2 , δ = 3.99 (J PH = 198 Hz)) [8]. Diphosphines of the type (RPH) 2 , like 5, are known in some instances to thermally degrade to primary phosphines RPH 2 and phosphacycles [23,24], but such products were not observed under these conditions. Phosphine product 5 was not observed as a side product in the hydrophosphination of 2-vinyl pyridine (Scheme 2).…”

“…Treatment of equimolar amounts of 2 and 1 in toluene results in the formation of the zirconium phosphide 6 after ten minutes (Equation (2) phosphacycles [23,24], but such products were not observed under these conditions. Phosphine product 5 was not observed as a side product in the hydrophosphination of 2-vinyl pyridine (Scheme 2).…”