Abstract
The reaction of triosmium alkylidyne cluster [Os3(μ-H)3(CO)9(μ3-CCI)] with excess bis(diphenylphosphino)methane (dppm), bis(diphenylphosphino)ethane (dppe) or bis(diphenylphosphino)propane (dppp) in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (dbu) yields [Os3(μ-H)2(CO)9(μ3-CPPh2CH2PPh2)] 1, [Os3(μ-H)2(CO)9(μ3-CPPh2CH2CH2PPh2)] 2, and a linking cluster [{Os3(μ-H)2(CO)9(μ3-C)}2(μ-dppp)] 3 respectively in moderate yields. Complexes 1 and 2 are found to undergo ring formation by decarbonylation and formation of an Os-P bond to give new clusters [Os3(μ-H)2(CO)8(μ3-CPPh2CH2)PPh2] 4 and [Os3(μ-H)2(CO)8(μ3--CPPh2CH2CH2)PPh2] 5. Single-crystal X-ray structural analyses of 3 and 4 have shown that there was a phosphine-substituted μ3-C ligand bonded to one of the triosmium metal cores, giving a five-membered osmacycle complex for 4, while 3 has the structure of a linking cluster, with the two triosmium alkylidyne cluster units linked by a dppp ligand.
| Original language | English |
|---|---|
| Pages (from-to) | 227-233 |
| Number of pages | 7 |
| Journal | Journal of Organometallic Chemistry |
| Volume | 518 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 12 Jul 1996 |
| Externally published | Yes |
Keywords
- Alkylidyne
- Bis(diphenylphosphino)alkane
- Carbonyl
- Clusters
- Crystal structure
- Osmium
ASJC Scopus subject areas
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry