| Autor: |
Kronenburg, C. M. P., Jastrzebski, J. T. B. H., Lutz, M., Spek, A. L., Koten, G. van |
| Zdroj: |
Organometallics; May 2003, Vol. 22 Issue: 11 p2312-2317, 6p |
| Abstrakt: |
The neutral, mixed 2:2 aryl-alkynyl-cuprates [Cu2Li2(C&tbd1;CR)2Ar2] (Ar = [C6H4{CH2N(Me)CH2CH2NMe2}-2]-; R = C6H4Me-4 (3a) or C6H4SiMe3-4 (3b)) are the first examples of cuprates that contain two different organic homocuprate parts ([Ar−Cu−Ar]- and [(RC&tbd1;C)−Cu−(C&tbd1;CR)]-) in one assembled structure. Each part has a two-coordinate Cu atom in linear geometry. They are held together by Li−Cipso interactions to two Li atoms. Tetrahedral four-coordination at the Li centers is completed by N,N-chelation of the ortho-diamine substituent of the Ar ligand. Compound 3 is formed as the only reaction product in almost quantitative yield when LiAr and Cu(C&tbd1;CR) aggregates are mixed together in equimolar amounts. This cuprate is an example of ion-pairing between two different homocuprate anions and two Li cations. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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