Synthetic strategies to bicyclic tetraphosphanes using P1, P2 and P4 building blocks.
Different reactions of Mes* substituted phosphanes (Mes* = 2,4,6-tri-tert-butylphenyl) led to the formation of the bicyclic tetraphosphane Mes*P4Mes* (5) and its unknown Lewis acid adduct 5·GaCl3. In this context, the endo-exo isomer of 5 was fully characterized for the first time. The synthesis was achieved by reactions involving "self-assembly" of the P4 scaffold from P1 building blocks (i.e. primary phosphanes) or by reactions starting from P2 or P4 scaffolds (i.e. a diphosphene or cyclic tetraphosphane). Furthermore, interconversion between the exo-exo and endo-exo isomer were studied by (31)P NMR spectroscopy. All compounds were fully characterized by experimental as well as computational methods.
Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, D-18059 Rostock, Germany. axel.schulz@uni-rostock.de.
Jonas
J
Bresien
Kirill
K
Faust
Christian
C
Hering-Junghans
Julia
J
Rothe
Axel
A
Schulz
Alexander
A
Villinger