Substituenteneinflüsse auf Synthese und Eigenschaften von Hexakis[phosphanaurio(I)]methanium(2+)bis(tetrafluoroboraten) / Substituent Effects in Synthesis and Properties of Hexakis[phosphineaurio(I)]methanium(2 +) Bis(tetrafluoroborates)
1992; De Gruyter; Volume: 47; Issue: 12 Linguagem: Inglês
10.1515/znb-1992-1214
ISSN1865-7117
AutoresHubert Schmidbaur, Benno Brachthäuser, Siegfried Gamper, Annette Schier, Oliver Steigelmann,
Tópico(s)Organometallic Complex Synthesis and Catalysis
ResumoPolyaurated carbon complexes of the type [(L–Au) 6 C] 2+ with functionalized phosphine ligands have been prepared by the reaction of the phosphinegold(I) chlorides R(Ph) 2 PAuCl (R = p-C 6 H 4 -Cl 2a,p-C 6 H 4 -Br 2b,p-C 6 H 4 -CH 3 2c,p-C 6 H 4 -OCH 3 2d,p-C 6 H 4 -COOH 2e, p-C 6 H 4 –N(CH 3 ) 2 2f), R 2 (Ph)PAuCl (R = p-C 6 H 4 -N(CH 3 ) 2 2g) and R 3 PAuCl (R = p-C 6 H 4 -N(CH 3 ) 2 2h) with tetrakis(dimethoxyboryl)methane in HMPT at room temperature. Clearly depending on the different inductive and mesomeric effects, the preparation of the clusters with substituents like –CH 3 3c, –OCH 3 3d and –N(CH 3 ) 2 3f needs shorter reaction times and the products show better solubility in organic solvents than those with functional groups like –Cl 3a, –Br 3b and –COOH 3e. The 31 P magnetic resonance parameters are correlated with electronic effects of the substituents, but the chemical shift of the interstitial carbon atom in the 13 C-NMR spectra is largely independent of the coordinating ligands. For the phosphinegold(I) chlorides 2f–h X-ray structure analyses have been performed.
Referência(s)