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| | CHLOROTRIS(TRIPHENYLPHOSPHINE)COBALT(I) Basic information | | Reaction |
| | CHLOROTRIS(TRIPHENYLPHOSPHINE)COBALT(I) Chemical Properties |
| Melting point | 135-139 °C (dec.)(lit.) | | storage temp. | Inert atmosphere,Room Temperature | | solubility | sol benzene and CH2Cl2; insol EtOH. | | form | Powder | | color | brown | | Water Solubility | Insoluble in water. | | Sensitive | Air & Moisture Sensitive |
| | CHLOROTRIS(TRIPHENYLPHOSPHINE)COBALT(I) Usage And Synthesis |
| Reaction |
- Cobalt(I)-catalyzed, steroselective olefination of alkylzinc reagents with aryl aldehydes.
- Reagent for the reductive radical dimerization of 3-haloindoline derivatives.
- Cobalt-catalyzed, asymmetric addition of silylacetylene to 1,1-disubstituted allenes.
| | Description | Chlorotris(triphenylphosphine)cobalt is a monovalent cobalt complex; homogeneous catalyst for hydrogenation and hydrodimerization of
alkenes; strong nucleophile, reacting with alkyl acyl halides to afford coupling products; useful for
the preparation of organocobalt complexes. | | Uses | A stoichiometric reducing agent that is used in the radical dimerization of halogenated organic molecules. | | Uses | A stoichiometric reducing agent employed in the radical dimerization of halogenated organic molecules. | | Preparation | Preparative Methods of Chlorotris(triphenylphosphine)cobalt: a solution of Cobalt(II) Chloride hexahydrate (0.6 g, 2.5 mmol) and
Triphenylphosphine (2.0 g, 7.6 mmol) in EtOH (70 mL) was treated under N2 and stirring with a
solution of Sodium Borohydride (0.08 g, 2.1 mmol) in EtOH at 30-40 °C; the resulting brown-green
precipitate was washed several times with EtOH and water and dried (yield 92%);[1] reductions with
powdered Zn, and electrolysis, are equally effective methods; corresponding Br and I complexes are
prepared similarly from CoBr2 and CoI2. | | reaction suitability | core: cobalt
reagent type: catalyst | | storage | Chlorotris(triphenylphosphine)cobalt is fairly stable in air; it has been stored under
N2 atmosphere over several months at rt. | | References | 1. (a) Aresta, M.; Rossi, M.; Sacco, A. ICA 1969, 3, 227. (b) Holah, D. G.; Hughes, A. N.; Hui, B. C.; Kan, C.
T. CJC 1978, 56, 814. |
| | CHLOROTRIS(TRIPHENYLPHOSPHINE)COBALT(I) Preparation Products And Raw materials |
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