Gudat, Dietrich and Holderberg, Andreas W. and Korber, Nikolaus and Nieger, Martin and Schrott, Martin (1999) Bis-phosphonio-isophosphindolide copper complexes. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 54 (10). pp. 1244-1252. ISSN 0932-0776,
Full text not available from this repository.Abstract
Bis-triphenylphosphonio-isophosphindolide salts 1[X] react with Cu(I)-halides CuX to give isolable products of composition [(1)Cu2X3]. X-ray crystal structure analyses confirmed that for X = Br Cl dinuclear complexes [(mu-1)(mu-X)Cu2X2] with mu(2),eta(1) (P)-bridging cations 1 are Formed, while for X = I a solid phase containing a salt (1)(2) [Cu4I6] and a complex [(1)(2)Cu4I6] with a terminal eta(1)(P)-coordinated ligand I was obtained. The bonding parameters in the two types of complexes suggest that 1 is a hybrid between a phosphenium cation and a phospholide anion whose pi-system is less nucleophilic than the phosphorus lone-pair. P-31 NMR studies revealed that in solution in all cases binuclear complexes [(1)Cu2X3] are in dynamic equilibrium with small amounts of mononuclear species and Free I. The same equilibria were detected in the system 1[OTf]/CuOTf. NMR studies of ligand exchange reactions indicated that the stability of complexes [(1)Cu2X3] increases in the order X = OTf < I < Br, Cl, and titration of [(1)Cu2Br3] with Et4NBr allowed to determine the equilibrium constant of the complex formation reaction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | STRUCTURAL CHARACTERIZATION; IODOCUPRATES(I); ACETONITRILE; CATIONS; SALTS; ACIDS; BASES; phosphorus heterocycles; copper complexes; crystal structure; P-31 NMR data |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Nikolaus Korber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Dec 2022 05:49 |
| Last Modified: | 21 Dec 2022 05:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48988 |
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