Affiliation:
1. Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35043 Marburg Germany
2. Current address Karlsruhe Institute of Technology (KIT) Institute of Nanotechnology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
Abstract
AbstractHerin, the high yielding synthesis of the chiral carbodiphosphorane (3) prepared in a two‐step procedure from commercially available (R)‐BINAP (([1,1′‐binaphthalene]‐2,2′‐diyl)bis(diphenylphosphane), BINAP) and dibromomethane is presented. In the first reaction step, the bis phosphonium salt 1[Br]2 is obtained, which is subsequently deprotonated either with potassium hydroxide to yield the mono phosphonium salt 2[Br], or with potassium hexamethyldisilazide to produce 3. Moreover, coinage metal complexes of 3 were prepared via reaction with CuCl (4Cu, 5Cu, 6Cu), Cu(OTf)⋅toluene0.5 (7Cu) or AuCl ⋅ (tht) (5Au, 6Au). The prepared compounds were characterised by NMR‐ and IR‐spectroscopy, mass spectrometry, elemental analysis, single crystal X‐ray diffraction and UV/Vis spectroscopy. Photoluminescence emission spectra were obtained for most of the complexes (3, 4Cu, 5Cu, 6Cu and 6Au).