| Autor: |
Chen‐Ju Liu, Chia-Huei Lai, Wen-Feng Liaw |
| Rok vydání: |
1992 |
| Předmět: |
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| Zdroj: |
Journal of the Chinese Chemical Society. 39:409-413 |
| ISSN: |
0009-4536 |
| DOI: |
10.1002/jccs.199200070 |
| Popis: |
The anionic [MeSeFe(CO)4] and [MeSeCr(CO)5] complexes were synthesized by reaction of [PPN][HFe(CO)4] and [PPN][HCr(CO)5] with MeSeSeMe respectively via nucleophilic cleavage of the Se-Se bond. The ease of cleavage of the Se-Se bond follows the nucleophilic strength of metal-hydride complexes. Methylation of [RSeCr(CO)5−] by the soft alkylating agent MeI resulted in the formation of neutral (MeSeMe)Cr(CO)5 in THF at 0°C. In contrast, the [ICr(CO)5−] was isolated at ambient temperature. Reaction of [MeSeFe(CO)4−] or [MeSeCr(CO)5−] with HBF4 yielded (CO)3Fc(μ-SeMe)2Fe(CO)3 dimer and anionic [(CO)5Cr(μ-SeMe)Cr(CO)5−] respectively, and no neutral (HSeMe)Fe(CO)4 and (HSeMe)Cr(CO)5 were detected spectrally (IR) even at low temperature. Reaction of NOBF4 or [Ph3C][BF4] and [MeSeCr(CO)5−] resulted in the neutral monodentate (MeSeSeMe)Cr(CO)5 complex. Addition of 1 equiv CpFe(CO)2I to 2 equiv [MeSeCr(CO)5−] gave CpFe(CO)2(SeMe) and the anionic [(CO)5Cr(μ-SeMe)Cr(CO)5−] in THF at ambient temperature. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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