| | 1 | Author
| JoséM. López-De-Luzuriaga, Marcus Söldner, Annette Schier, Hubert Schmidbaur | Requires cookie* | | | Title
| Gold(I) Complexes of Open-chain and Cyclic Di-secondary Amines  | | | | Abstract
| Treatment of N,N'-diisopropyl-ethylenediamine or 1,4-piperazine with two equivalents of [(Ph^P)Au]+ BF4-leads to binuclear complexes of the diamines: {[(Ph3P)Au]HN('Pro)NCH2-}22+ 2 BF4~ (1) and {[(Ph3P)Au]HNCH2CH2}22+ 2 BF4~ (2), respectively. In the products each quaternary ammonium center bears one gold ligand, one hydrogen atom and two alkyl substituents. The crystal structures of both compounds have been determined. Compound 1 contains discrete ion-triples. The ethylene bridge in the dications is in an unfolded conformation, with a crystallographic center of inversion, and allows for weak hydrogen bonding N-H--F [2.085 A; N-H--F 169.2°] between the NH functions and the counterions. The existing distant contacts F-A u [3.599 A] are probably less significant for the aggregation of the ion triples, but will contribute through Coulomb forces. Compound 2 crystallizes with two solvent molecules CH2CI2. The dication has a crystallographic center of inversion with the piperazine ring in a chair conformation and the gold atoms in equatorial positions. There are hydrogen bonds N-H--F [2.076 and 2.457 A] between the dication and the anions which lead to the formation of ion-triples, with further contacts between the BF4~ anions and the solvent molecules [C-H--F 2.340 and 2.446 A]. | | | |
Reference
| Z. Naturforsch. 52b, 209—213 (1997); received December 4 1996 | | | |
Published
| 1997 | | | |
Keywords
| Gold(I) Coordination, Amine Complexes, Secondary Amines, Ammonium Complexes | | | |
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| default:Reihe_B/52/ZNB-1997-52b-0209.pdf | | | | Identifier
| ZNB-1997-52b-0209 | | | | Volume
| 52 | |
| 2 | Author
| AndreasG. Rohm, Ann, Jürgen Riede, Hubert Schmidbaur | Requires cookie* | | | Title
| Gold(I) Complexes of Secondary and Tertiary Amines. Crystal Structure of Triphenylphosphineaurio(I)quinuclidinium Tetrafluoroborate | | | | Abstract
| The secondary amine piperidine and the tertiary amine quinuclidine (l-azabicyclo[2.2.2]-octane) were reacted in TH F with one equivalent of triphenylphosphinegold(I) tetrafluoro borate, [Ph3PAu]+ BF4", to give the m onoaurated ammonium salts of formula [R"NHp_")AuPPh3]+ BF4~ (n = 2, 3). The compounds were obtained as crystalline solids in good yields, and were characterized by IR and N M R spectroscopy as well as mass spectrom etry and elemental analysis. The crystal structure of the quinuclidinium salt was determined (space group Pbca, Z = 8). The analysis shows independent formula units with no intermolec ular Au---Au contacts. The A u (I)-N bond (2.11(1) Ä) is significantly longer than the average value found in poly-aurated ammonium salts. | | | |
Reference
| Z. Naturforsch. 47b, 1255—1260 (1992); received June 4 1992 | | | |
Published
| 1992 | | | |
Keywords
| Gold(I)-N itrogen Bond, Secondary Amine, Tertiary Amine, Quinuclidine, X-Ray | | | |
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| default:Reihe_B/47/ZNB-1992-47b-1255.pdf | | | | Identifier
| ZNB-1992-47b-1255 | | | | Volume
| 47 | |
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