Abstract
The reaction of symmetrical dinucleating ligands 3,5-bis(4-methoxyphenyliminoacetyl)-4-methylpyrazole (bmimpH, 1a) and 3,5-bis(2,6-dimethylphenyliminoacetyl)-4-methylpyrazole (bdmimpH, 1b) with [(mu-Me(2)S)PtMe(2)](2) or (Me(2)S)(2)PtPh(2) affords selectively mononuclear complexes LPtMe(SMe(2)) or LPtPh(SMe(2)) (L = bmimp, bdmimp). Reaction of these complexes with CuCl gives access to ionic compounds {[LPtMe(SMe(2))](2)Cu(+)CuCl(2)(-) and [LPtPh(SMe(2))](2)Cu(+)CuCl(2)(-), which exhibit dynamic behavior in solution for L = bdmimp. Ligand deprotonation followed by reaction with (Me(2)S)(2)PtPh(2) affords mononuclear anionic complexes K(+)[LPtPh(2)](-). These react with CuCl to give dimeric structures of formula {[LPtPh(2)](2)Cu(2)}, which exhibit Pt -> Cu dative bonds and a Cu-Cu contact, and dynamic behavior in solution.
| Original language | English |
|---|---|
| Pages (from-to) | 4903-4916 |
| Number of pages | 14 |
| Journal | Organometallics |
| Volume | 27 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 13 Oct 2008 |
| Externally published | Yes |
Funding
The authors acknowledge support from the Swiss National Science Foundation. We thank T. Michl for the first synthesis of 8a and Mr. Paul Seiler for the X-ray structure determinations, as well as Dr. Marc-Olivier Ebert for assistance with EXSY-NMR experiments.
Keywords
- C-H BOND
- ISOMERIC HETERODINUCLEAR COMPLEXES
- CONTAINING DINUCLEAR COMPLEXES
- SWITCHED METAL ARRANGEMENTS
- DIIMINE AQUA COMPLEX
- LEWIS-BASE ADDUCTS
- HETEROBIMETALLIC COMPLEXES
- MILD CONDITIONS
- ALKANE DEHYDROGENATION
- HYDROCARBON ACTIVATION