New Halo Compounds of Si, P, As, AND Sb Bearing a Bulky Substituted Fluorenyl Group
摘要:
New halo compounds of Si, P, As, and Sb potential precursors of doubly-bonded derivatives of these elements, have been synthesized: dichloro-and difluorosilanes 2-6 bearing a methylfluorenyl group and a second substituent of various size (Me, Ph, Mes, R2CMe); dichlorophosphines 13 and 14, fluoro- and difluoroarsines 15 and 16 and fluorostibine 17, substituted by the diphenyl (or dimesityl) phosphinofluorenyl group. Phosphine oxide and sulfide 9 and 10 also have been prepared.
carbon–heteroatom (C–P, C–O, C–S, and C–N) bonds via C–N cleavage of benzyl ammoniumsalts under transition-metal-free conditions was reported. The combination of t-BuOK and 18-crown-6 enabled a wide range of substituted benzyl ammoniumsalts to couple readily with different kinds of heteroatom nucleophiles, i.e. hydrogen phosphoryl compounds, alcohols, thiols, and amines. Good functional group tolerance was demonstrated
In an OLED there is a reflectivity influencing layer (
27
) which is preferably semi-absorbent and in embodiments is dark coloured or black which is formed of a sublimable organometallic compound. The reflectivity influencing layer is formed between an electrode (
29
or
22
) and a light-emitting layer (
25
).