cis-Dichlorobis(ethylenediamine)cobalt(III) chloride is a salt with the formula [CoCl2(en)2]Cl (en = ethylenediamine). The salt consists of a cationic coordination complex and a chloride anion. It is a violet diamagnetic solid that is soluble in water. 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 racemate can be resolved into two enantiomers (Λ and Δ) by the formation of the d-α-bromocamphor-π-sulfonate salt. The diastereomeric salts are separated by recrystallization. After their purification, the individual diastereomers are converted back to the chloride salt by reaction with ice cold hydrochloric acid.[2]
Λ-cis-[CoCl2(en)2]+
Δ-cis-[CoCl2(en)2]+
UV-vis spectra of various stages in the conversion of trans-[CoCl2(en)2]+ to the cis isomer.
Related complexesEdit
This salt is less soluble than its dull-green isomer trans-dichlorobis(ethylenediamine)cobalt(III) chloride. This pair of isomers were significant in the development of the area of coordination chemistry.[3] The chiral cis isomer is obtained by heating the trans isomer. Both isomers of dichlorobis(ethylenediamine)cobalt(III) have often been used in stereochemical studies.
^John C. Bailar, Jr. (1946). "Cis - and trans -Dichlorobis-(ethylenediamine)cobalt(III) Chloride and the Resolution of the cis Form". Cis- and Trans-Dichlorobis-(Ethylenediamine)Cobalt(III) Chloride and the Resolution of the Cis Form. Inorganic Syntheses. Vol. 2. p. 222-225. doi:10.1002/9780470132333.ch71. ISBN9780470132333.
^Jörgensen, S.M. "Ueber Metalldiaminverbindungen" J. prakt. Chem. (in German), 1889, volume 39, page 8. doi:10.1002/prac.18890390101
August 29, 2023
dichlorobis, ethylenediamine, cobalt, chloride, salt, with, formula, cocl2, ethylenediamine, salt, consists, cationic, coordination, complex, chloride, anion, violet, diamagnetic, solid, that, soluble, water, chloride, this, salt, readily, undergoes, exchange,. cis Dichlorobis ethylenediamine cobalt III chloride is a salt with the formula CoCl2 en 2 Cl en ethylenediamine The salt consists of a cationic coordination complex and a chloride anion It is a violet diamagnetic solid that is soluble in water One chloride ion in this salt readily undergoes ion exchange but the two other chlorides are less reactive being bound to the metal center cis Dichlorobis ethylenediamine cobalt III chloride IdentifiersCAS Number 14040 32 5 Y3D model JSmol Interactive imageChemSpider 360279 YPubChem CID 166987InChI InChI 1S 2C2H6N2 2ClH Co c2 3 1 2 4 h2 3 4H 1 2H2 2 1H q2 2 2 p 2 YKey LBGRXLRZGLIOLI UHFFFAOYSA L YInChI 1 2C2H6N2 2ClH Co c2 3 1 2 4 h2 3 4H 1 2H2 2 1H q2 2 2 p 2Key LBGRXLRZGLIOLI NUQVWONBAESMILES Cl Co Cl NH CC NH NH CC NH PropertiesChemical formula C4H16Cl3CoN4Molar mass 285 48 g mol 1Appearance violet solidMelting point decomposesSolubility in water goodHazardsGHS labelling 1 PictogramsSignal word WarningHazard statements H315 H319 H335Precautionary statements P261 P264 P271 P280 P302 P352 P304 P340 P305 P351 P338 P312 P321 P332 P313 P337 P313 P362 P403 P233 P405 P501Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa N verify what is Y N Infobox referencesSynthesis and optical resolution EditCis dichlorobis ethylenediamine cobalt III chloride is obtained by heating a solution of trans dichlorobis ethylenediamine cobalt III chloride e g using a steam bath The racemate can be resolved into two enantiomers L and D by the formation of the d a bromocamphor p sulfonate salt The diastereomeric salts are separated by recrystallization After their purification the individual diastereomers are converted back to the chloride salt by reaction with ice cold hydrochloric acid 2 L cis CoCl2 en 2 D cis CoCl2 en 2 UV vis spectra of various stages in the conversion of trans CoCl2 en 2 to the cis isomer Related complexes EditThis salt is less soluble than its dull green isomer trans dichlorobis ethylenediamine cobalt III chloride This pair of isomers were significant in the development of the area of coordination chemistry 3 The chiral cis isomer is obtained by heating the trans isomer Both isomers of dichlorobis ethylenediamine cobalt III have often been used in stereochemical studies Tris ethylenediamine cobalt III chloride in contrast to the bis ethylenediamine complexes does not undergo substitution References Edit 575909 sigma Retrieved 15 December 2021 John C Bailar Jr 1946 Cis and trans Dichlorobis ethylenediamine cobalt III Chloride and the Resolution of the cis Form Cis andTrans Dichlorobis Ethylenediamine Cobalt III Chloride and the Resolution of theCisForm Inorganic Syntheses Vol 2 p 222 225 doi 10 1002 9780470132333 ch71 ISBN 9780470132333 Jorgensen S M Ueber Metalldiaminverbindungen J prakt Chem in German 1889 volume 39 page 8 doi 10 1002 prac 18890390101 Retrieved from https en wikipedia org w index php title Cis Dichlorobis ethylenediamine cobalt III chloride amp oldid 1171288476, wikipedia, wiki, book, books, library,
