| | 1 | Author
| Dietrich Gudata, AndreasW. Holderberg3, Nikolaus Korberb, Martin Nieger3, Martin Schrott3 | Requires cookie* | | | Title
| Bis-phosphonio-isophosphindolide Copper Complexes  | | | | Abstract
| Bis-triphenylphosphonio-isophosphindolide salts 1[X] react with Cu(I)-halides CuX to give isolable products of composition [(l)Cu2X3]. X-ray crystal structure analyses confirmed that for X = Br, Cl dinuclear complexes [(/y-1)(/i-X)Cu2X2] with /i2j;'(P)-bridging cations 1 are formed, while for X = I a solid phase containing a salt (l^lC u*^] and a complex [(l^ C u .^ ] with a terminal ?/(P)-coordinated ligand 1 was obtained. The bonding parameters in the two types of complexes suggest that l i s a hybrid between a phosphenium cation and a phospholide anion whose 7T-system is less nucleophilic than the phosphorus lone-pair.31P NMR studies revealed that in solution in all cases binuclear complexes [(l)Cu2X3] are in dynamic equilibrium with small amounts of mononuclear species and free 1. The same equilibria were detected in the system l[OTf]/CuOTf. NMR studies of ligand exchange reactions indicated that the stability of complexes [(l)Cu2X3] increases in the order X = OTf < 1 < Br, Cl, and titration of [(l)Cu2Bn] with EuNBr allowed to determine the equilibrium constant of the complex formation reaction. | | | |
Reference
| Z. Naturforsch. 54b, 1244—1252 (1999); received July 6 1999 | | | |
Published
| 1999 | | | |
Keywords
| Phosphorus Heterocycles, Copper Complexes, Crystal Structure, '' P NMR Data | | | |
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| default:Reihe_B/54/ZNB-1999-54b-1244.pdf | | | | Identifier
| ZNB-1999-54b-1244 | | | | Volume
| 54 | |
| 2 | Author
| G. Ünter, Paulus Schiem, Ralph Bukowski, Lars Eckholtz, B. Ernhard Vamskiihler | Requires cookie* | | | Title
| peri-Interactions in Naphthalenes, 3 [1]. On Hypercoordination in 8-Dim ethylamino-naphth-l-yl-phosphonium salts and -phosphines | | | | Abstract
| In (alkyl)di(aryl)(8-dim ethylamino-naphth-l-yl)phosphonium salts and in the parent phos phines, there is no experimental evidence of dative N -^ P interactions. Conclusions to the contrary are based on the choice of improper standards of comparison. In tro d u c tio n | | | |
Reference
| (Z. Naturforsch. 55b, 12—20 [2000]; received October 28 1999) | | | |
Published
| 2000 | | | |
Keywords
| Naphthalenes, 'H NMR Data, ''P NMR Data, Interatomic Distances, Repulsive Interaction | | | |
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| default:Reihe_B/55/ZNB-2000-55b-0012.pdf | | | | Identifier
| ZNB-2000-55b-0012 | | | | Volume
| 55 | |
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