| Autor: |
Mark S. Wrighton, C. Randolph Bock, Donald L. Tipton, Robert Bau, Beda E. Fischer, David S. Ginley |
| Rok vydání: |
1978 |
| Předmět: |
|
| Zdroj: |
Journal of Organometallic Chemistry. 157:41-50 |
| ISSN: |
0022-328X |
| Popis: |
Reaction of photogenerated (η5−C5H5)2W2(CO)4 with acetylene at 25°C yields a complex of the formula (η5-C5H5)2W2(CO)4(C2H2). The crystal structure of the complex shows it to have a tetrahedrane-like W2C2 core. The C—C bond distance of the C2H2 unit is 1.33 A which is close to that of ethylene, considerably longer than the 1.20 A for acetylenes. The W—W distance is 2.987 A which is ∼0.25 A shorter than the W—W distance in (η5-C5H5)2W2(CO)6 but longer than that expected for (η5-C5H5)2W2(CO)4. By analogy to the parent (η5-C5H5)2M2(CO)6 species, the near-UV absorption in (η5-C5H5)2M2(CO)4(C2H2) is assigned to a σb → σ* transition. Owing to the shorter M—M bond in the C2H2 adducts, the σb → σ* absorption is at higher energy than in the (η5-C5H5)2M2(CO)6 complexes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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