trans-Dichlorobis(ethylenediamine)cobalt(III) chloride
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IUPAC name
(OC-6-12′)-Dichloridobis(ethane-1,2-diamine-κ2N,N′)cobalt(1+) chloride(1−)
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Identifiers | |
3D model (
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PubChem CID
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Properties | |
C4H16Cl3CoN4 | |
Molar mass | 285.48 g·mol−1 |
Appearance | green solid |
Melting point | decomposes |
good | |
Hazards | |
GHS labelling: | |
Warning | |
H315, H319, H335 | |
P261, P305+P351+P338 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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trans-Dichlorobis(ethylenediamine)cobalt(III) chloride is a salt with the formula [CoCl2(en)2]Cl (en = ethylenediamine). It is a green diamagnetic solid that is soluble in water. It is the monochloride salt of the cationic coordination complex [CoCl2(en)2]+. One chloride ion in this salt readily undergoes ion exchange but the two other chlorides are less reactive, being bound to the metal center. The more stable cis-dichlorobis(ethylenediamine)cobalt(III) chloride is also known.
Synthesis
The compound is synthesized by the reaction of cobalt(II) chloride and ethylenediamine in hydrochloric acid in the presence of oxygen:
- 4 CoCl2 + 8 en + 4 HCl + O2 → 4 trans-[CoCl2(en)2]Cl + 2 H2O
The initial product contains HCl, which is removed by heating. Alternatively, (carbonato)bis(ethylenediamine)cobalt(III) chloride reacts with hydrochloric acid at 10 °C to give the same species.[1]
- [Co(CO3)(en)2]Cl + 2 HCl → trans-[CoCl2(en)2]Cl + CO2 + H2O
Related complexes
This salt is more soluble than cis-dichlorobis(ethylenediamine)cobalt(III) chloride. This pair of isomers were significant in the development of the area of
Tris(ethylenediamine)cobalt(III) chloride in contrast to the bis(ethylenediamine) complexes does not undergo substitution.
References
- ISBN 978-0-470-13245-6.