N,C-bound phosphenium cations: Synthesis and reactivity with small molecules
LE3 .A278 2012
Bachelor of Science
Several monochlorophosphines, each possessing a diisopropylamido substituent and either an alkyl (tert-butyl = tBu) or an aryl (2,4,6-trimethylphenyl = Mes) substituent, were synthesized. Phosphenium cations were then generated from a number of these precursors through either halide abstraction with the Lewis acid Al2Cl6, or through salt metathesis with AgOTf (OTf = CF3SO3) and characterized using 31P NMR spectroscopy. H2 gas was bubbled through a CH2Cl2 solution of either the phosphenium AlCl4 or OTf salts and the reaction mixture was analyzed by 31P NMR spectroscopy to investigate the formation of an H2 activation product. The AlCl4 derivative was also tested for NH3 activation and the products were characterized by 31P NMR spectroscopy.
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