Synthesis and Characterization of a Product of a Reaction Between Trans-dichlorido-bis-(ethylenediamine)cobalt(III) with L-cystine

摘要

Substitution reaction of complex, trans-[CoCl₂(en)₂]Cl, with sulfur containing agent L-cystine, has been studied 1.0 ?? 10a??1 mol dma??3 aqueous perchlorate medium at various temperatures (30?°C to 50?°C) and pH (4.45 to 3.30) using Uv-vis spectrophotometer. The products are characterized by physico-chemical and spectroscopic methods datasets at various pH and temperatures. From this method, cis-[CoCl(en)₂(H₂O)]2+, hydrolysis of trans-[CoCl₂(en)₂]+, has formed complex to L-cystine, acts as bidentate ligand, through one Co-S and Co-N bonds at low pH (3.30). At high pH (3.75 to 4.45), this complex has formed product through Co-N and Co-O bonds. The activation parameters E_a, ??H# and ??S# have been determined. The products, SNi, and reversible rate constants have been evaluated.View full textDownload full textKeywordskinetics, L-cystine, product formation, SNi mechanismRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/15533174.2011.568432