%0 Journal Article
%T Synthesis of Diazonium Tetrachloroaurate(III) Precursors for Surface Grafting
%A Sabine N. Neal
%A Samuel A. Orefuwa
%A Atiya T. Overton
%A Richard J. Staples
%A Ahmed A. Mohamed
%J Inorganics
%D 2013
%R 10.3390/inorganics1010070
%X The synthesis of diazonium tetrachloroaurate(III) complexes [R-4-C 6H 4N¡ÔN]AuCl 4 involves protonation of anilines CN-4-C 6H 4NH 2, C 8F 17-4-C 6H 4NH 2, and C 6H 13-4-C 6H 4NH 2 with tetrachloroauric acid H[AuCl 4] 3H 2O in acetonitrile followed by one-electron oxidation using [NO]PF 6. FT-IR shows the diazonium stretching frequency at 2277 cm £¿1 (CN), 2305 cm £¿1 (C 8F 17), and 2253 cm £¿1 (C 6H 13). Thermogravimetric Analysis (TGA) shows the high stabilities of the electron-withdrawing substituents C 8F 17 and CN compared with the electron-donating substituent C 6H 13. Residual Gas Analysis (RGA) shows the release of molecular nitrogen as the main gas residue among other small molecular weight chlorinated hydrocarbons and chlorobenzene. Temperature-Dependent X-Ray Powder Diffraction (TD-XRD) shows the thermal decomposition in C 6H 13 diffraction patterns at low temperature of 80 ¡ãC which supports the TGA and RGA (TGA-MS) conclusions. X-ray structure shows N¡ÔN bond distance of approximately 1.10 £¿ and N¡ÔN-C bond angle of 178¡ã.
%K diazonium
%K tetrachloroaurate(III)
%K X-ray
%U http://www.mdpi.com/2304-6740/1/1/70