| | 2 | Author
| Henri Brunner, M. Arkus, N. Iem Etz, M. Anfred Zabel | Requires cookie* | | | Title
| Optisch aktive Ubergangsmetall-Komplexe, 122 [1]. Synthese von Palladium(II)-Schiff-Base-Komplexen -intramolekulare Wechselwirkungen O ptically Active Transition M etal C om plexes, 122 [1], Synthesis of Palladium (II) Com plexes w ith Schiff B ase Ligands -Intram olecular Interactions  | | | | Abstract
| Imines of salicylaldehyde and 2,6-diformyl-p-cresol have been used as ligands in palla d iu m ^) complexes. Enantiomerically pure ligands give enantiomerically pure complexes, racemic ligands give racemates and meso-forms. Differences between the respective isomers of the ligands within the complexes and between the diastereomers of the complexes were investigated. Crystal structure analyses established the trans configuration at the metal center. | | | |
Reference
| Z. Naturforsch. 55b, 145—154 (2000); eingegangen am 25. Oktober 1999 | | | |
Published
| 2000 | | | |
Keywords
| Schiff Bases, Palladium(II) Complexes, Diastereomers, Crystal Structure | | | |
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| default:Reihe_B/55/ZNB-2000-55b-0145.pdf | | | | Identifier
| ZNB-2000-55b-0145 | | | | Volume
| 55 | |
| 3 | Author
| RolfW. Saalfrank3, Oliver Struck3, Karl Petersb, HansG. Eorg, Von Schneringb | Requires cookie* | | | Title
| Synthese und Struktur diastereomerer, zweikerniger Kupferkomplexe [1] Synthesis and Structure of Diastereomerie Dinuelear C opper Complexes [1] | | | | Abstract
| Depolym erisation of a copper(II)/pyrrolidine-based 2D -polym er 2 by 4.4'-bipyridyl [molar ratio: 2 (C u L 2) : l (Bipy)] and recrystallisation o f the reaction product leads to two visually distinguishable crystal charges, composed of dark green octahedra m eso-4 and light green rod-shaped crystals racem-5. Separation of the conglom erate of the morphologically different crystals is accomplished by pick out. The structure of the dinuelear complex racem-5 has been established unambigously by X-ray structure analysis. EPR and susceptibility measure ments of mixtures of complex meso-4 and racem-S indicate that there is no interaction be tween the two copper(II) centres. | | | |
Reference
| Z. Naturforsch. 49b, 1410—1414 (1994); eingegangen am 17. März 1994 | | | |
Published
| 1994 | | | |
Keywords
| Coordination Polymers, Depolymerisation, Dinuelear Copper Complexes, Diastereomers, X-Ray | | | |
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| default:Reihe_B/49/ZNB-1994-49b-1410.pdf | | | | Identifier
| ZNB-1994-49b-1410 | | | | Volume
| 49 | |
| 4 | Author
| Angela Bayler, Andreas Bauer, Hubert Schmidbaur | Requires cookie* | | | Title
| Chiral Phosphine Ligands in the Structural Chemistry of Gold | | | | Abstract
| The reaction of chloro(dimethylsulfide)gold(I) with (2-hydroxybutyl)diphenylphosphine (L) (racemic mixture) in dichloromethane affords high yields of the racemic chiral complex (L)AuCl. Metathesis reactions with KBr or KI, respectively, in a two-phase solvent mix ture (CH2CI2/H2O) lead to a conversion into the corresponding bromide and iodide complexes (L)AuBr and (L)AuI. Treatment of silver chloride with the ligand L in acetonitrile yields the analogous 1:1 adduct (L)AgCl. The compounds have been characterized by their analytical and spectroscopic data, and the structures of (L)AuCl and (L)AuBr have been determined by single-crystal X-ray diffraction. The compounds build isomorphous crystal lattices (monoclinic, P2i/c) in which pairs of enantiomers (R-and S-configuration of L) are aggregated by two long hydrogen bonds between the hydroxyl group of the ligand and the halogen substituent of the neighbouring molecule. Cationic, linear two-coordinate 1:2 complexes (L)2Au+ X-(X = BF4, CIO4, SO3CF3) and (L)2Ag+ X-(X = BF4) are obtained in good yields by reaction of L with Me2SAuCl and AgX (molar ratio 2:1:1) or with AgBF4 (molar ratio 2:1), respectively. 31P NMR studies at variable temperature show an equilibrium between all possible stereoisomers (RR, SS, RS, SR) in solution with rapid ligand exchange at ambient temperatures. | | | |
Reference
| Z. Naturforsch. 52b, 1477—1483 (1997); received October 14 1997 | | | |
Published
| 1997 | | | |
Keywords
| Gold Complexes, Phosphane Complexes, Chiral Phosphanes, Crystal Structure, Diastereomers | | | |
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| default:Reihe_B/52/ZNB-1997-52b-1477.pdf | | | | Identifier
| ZNB-1997-52b-1477 | | | | Volume
| 52 | |
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