Formation of trans(N)-bis(amino acidato)(2,2 '-bipyridine)cobalt(III) complexes following the UV irradiation of amino acidatobis(2,2 '-bipyridine)cobalt(III) complexes in dimethyl sulfoxide
Rm. Hartshorn et Sg. Telfer, Formation of trans(N)-bis(amino acidato)(2,2 '-bipyridine)cobalt(III) complexes following the UV irradiation of amino acidatobis(2,2 '-bipyridine)cobalt(III) complexes in dimethyl sulfoxide, J CHEM S DA, (18), 1999, pp. 3217-3224
Citations number
28
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
The products from the steady state photolysis of [Co(aa)(2,2'-bpy)(2)](2+)
(aa = glycinate (gly), alaninate (ala) or 2-aminoisobutyrate (aib)) complex
es in dmso have been identified, and include the trans(N)-[Co(aa)(2)(2,2'-b
py)](+) complex ions. This contrasts with photolyses in aqueous solution wh
ere the [Co(2,2'-bpy)(3)](3+) ion is produced. This solvent dependence can
be attributed to the secondary reactions of the photolysis products, rather
than to different photochemistry. Electrochemical data have been gathered
on a range of [Co(aa)(x)(2,2'-bpy)(y)]((3-x)+) compounds and are used to he
lp rationalise the observed selectivity. Two of the products have been char
acterised by X-ray crystallography: (Delta-SS/Lambda-RR)-trans(N)-[Co(ala)(
2)(2,2'-bpy)]ClO4. H2O and trans(N)-[Co(aib)(2)(2,2'-bpy)]ClO4. NaClO4. 0.5
H(2)O.