
%0 Journal Article
%A Angus, PM 
%A Golding, BT 
%A Jurisson, SS 
%A Sargeson, AM 
%A Willis, AC 
%T Intramolecular Condensation Reactions of S-Methylmethionine Coordinated to Cobalt(III)
%J Australian Journal of Chemistry
%D 1994/03/01
%V 47
%N 3
%P 501-510
%K 
%R https://doi.org/10.1071/CH9940501
%U https://www.publish.csiro.au/paper/CH9940501 
%X The sulfonium salt [(en)2CoO2CCH(NH2)(CH2)2S(CH3)2]3+ (en = ethane-1,2-diamine), prepared by methylation of the thioether group of N,O-coordinated methionine , undergoes a set of complex, intramolecular condensations, oxidations, and rearrangements in aqueous base to give a novel pentadentate cobalt(III) complex (c. 20%) of the 1,9-diamino-4-hydroxy-3,7-diazanonane-4-carboxylate ion ( dhnc ). Its structure has been determined by X-ray crystallographic analysis as trans(O,O)-[Co( dhnc )(OH2)](ClO4)2.2H2O. The crystals were monoclinic, space group P 21/c with a 9.053(2), b 29.437(7), c 7.661(1) &#506;, &#946; 106.63(1)&#176;, and Z 4; 2383 data with I &#8805; 3&#963;(I) were refined to conventional R factors of 0.046 and 0.060. Investigations concerning the mechanism for the formation of this complex are described. 
