Nouveaux dérivés alkylés et acétylés de carbonyles d'osmium

Authors

  • F. L'Eplattenier Institut de chimie, Université de Neuchâtel, 2000 Neuchâtel

DOI:

https://doi.org/10.2533/chimia.1969.144

Abstract

The sodium salt Na[OsH(CO)4] has been obtained in high yields by the reduction of OsH2(CO)4 with sodium sand in tetrahydrofuran. The nuclear magnetic resonance and infrared spectra are in agreement with a symmetry C3v and a metal-hydrogen bond.
This monosodium derivate is a strong nucleophilic reagent and reacts with methyl iodide to give the new alkyl compound: OsCH3H(CO)4. NMR and infrared spectra indicate a cis-octahedral structure for this substance.
Methylhydridotetracarbonylosmium could not be isolated in a pure state; at room temperature it decomposes very rapidly with evolution of methane. On addition of triphenylphosphine or methyl iodide the decomposition is promoted; Os(CO)4P(C6H5)3 and OsCH3I(CO)4 are formed.
The reaction of OsBr2(CO)4 with methyl magnesium bromide was also investigated. The salt [MgBr]2[Os(COCH3)2Br2(CO)2] was obtained.
Infrared and NMR data suggest an all cis-configuration for the anion [Os(COCH3)2Br2(CO)2]2-.

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Published

1969-04-30

Issue

Vol. 23 No. 4 (1969): Forschung/Research

Section

Kurze Mitteilungen

License

Copyright (c) 1969 F. L'Eplattenier

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
F. L'Eplattenier, Chimia 1969, 23, 144, DOI: 10.2533/chimia.1969.144.