Linkage isomeric oxamate chelates:rac-bis(ethane-1,2-diamine)oxamatocobalt(III) bis(trifluoromethanesulfonate) dihydrate and Λ(+)₅₇₈-bis(ethane-1,2-diamine)[oxamato(2−)]cobalt(III) trifluoromethanesulfonate

Abstract

The structures of rac-bis(ethane-1,2-diamine)(oxamato-kappa(2)O(1),O(2))cobalt(III) bis(trifluoromethanesulfonate) dihydrate, [Co(C(2)H(2)NO(3))(C(2)H(8)N(2))(2)](CF(3)SO(3))(2).2H(2)O, (I), and Lambda(+)(578)-bis(ethane-1,2-diamine)[oxamato(2-)-kappa(2)N,O(1)]cobalt(III) trifluoromethanesulfonate, [Co(C(2)HNO(3))(C(2)H(8)N(2))(2)]CF(3)SO(3), (II), are compared. Together, the two complexes constitute the first pair of linkage isomers of bidentate oxamate available for structural comparison.