| 18475895 |
Sevillano P, Garcia ME, Habtemariam A, Parsons S, Sadler PJ: Different coordination modes of a tripod phosphine in gold (i) and silver (i) complexes. Met Based Drugs. 1999;6(4-5):211-21.
The following gold (I) and silver (I) complexes of the tritertiary phosphine 1,1,1- tris (diphenylphosphinomethyl) ethane, tripod , have been synthesised: Au (3)(tripod) X (3) [X = Cl (1), Br (2), I (3)]; [Au (3)(tripod)(2) Cl (2)] Cl (4); Au (tripod) X [X = Br (5), I (6)]; Ag (3)(tripod) (NO (3))(4) (7), Ag (tripod) NO (3) (8). They were characterized by X-ray diffraction (complexes 2, 3 and 4), (31) P NMR spectroscopy, electrospray and FAB mass spectrometry and infrared spectroscopy. Complexes 2 and 3 show a linear coordination geometry for Au (I), with relatively short Au-P bond distances. Complex 3 has a Au***Au intramolecular distance of 3.326 A degrees , while complex 2 had a short Au***Au intermolecular interaction of 3.048 A degrees . Complexes 4-6 were found by (31) P NMR spectroscopy studies to contain a mixture of species in solution, one of which crystallised as [Au (3)(tripod|)(2) Cl (2)] Cl which was shown by X-ray diffraction to contain both tetrahedral and linear Au (I), the first example of a Au (I) complex containing such a mixture of geometries. The reaction of [Au (3) (tripod) Cl (3)] (1) with tripod led successfully to the formation of [Au (3)(tripod|)(2) Cl (2)](+) and [Au (3)(tripod)(2) Cl (3)](+) and [Au (3)(tripod|)(3) Cl](2+). The silver (I) complexes, 7 and 8 appear to contain linear and tetrahedral Ag (I), respectively. |
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