Preparation and structures of 1,2-dihydro-1,2-diphosphaacenaphthylenes and rigid backbone stabilized triphosphenium cation.
The effect of the special peri-geometry of rigid naphthalene-1,8-diyl backbone in phosphenium formation reaction was investigated. 1,8-Bis(diphenylphosphino) naphthalene and P2I4 afforded triphosphenium iodide in a clean reaction. The reaction of 1,8-bis(dimethylaminophosphino) naphthalene with P2I4 is complex, it afforded four products, all containing the 1,2-dihydro-1,2-diphosphaacenaphthylene motif and heterophosphonium functionalities. Two examples of the rare structural motif of two acenaphthylene units connected head to head and thus a contiguous chain of four phosphorus atoms were also isolated, one compound showing diastereomerization in the solution. All new compounds were fully characterised including single crystal X-ray diffraction.
Kilian
Petr
P
School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK.
Slawin
Alexandra M Z
AM
Woollins
J Derek
JD