The reaction of fac(S)-[Co(aet)3]
(aet = aminoethanethiolate) with [PdCl4]2− in a 2∶1 ratio in water gave an S-bridged CoIIIPdIICoIII trinuclear complex composed of two mer(S)-[Co(aet)3] units, [Pd{Co(aet)3}2]2+
([1]2+). In [1]2+, each of the two mer(S)-[Co(aet)3] units is bound to a square-planar PdII ion through two of three thiolato groups, leaving two non-bridging thiolato groups at the terminal. Of two geometrical forms, syn and anti, possible for [Pd{Co(aet)3}2]2+, which arise from the difference in arrangement of two terminal non-bridging thiolato groups, [1]2+ afforded only the syn form. A similar reaction of fac(S)-[Co(aet)3] with [PtCl4]2− or trans-[PtCl2(NH3)2] produced an analogous CoIIIPtIICoIII trinuclear complex, [Pt{Co(aet)3}2]2+
([2]2+), but both the syn and anti forms were formed for [2]2+. Complexes [1]2+ and syn- and anti-[2]2+, which exclusively exist as a racemic
(ΔΔ/ΛΛ) form, were successfully optically resolved with use of [Sb2(R,R-tartrato)2]2− as the resolving agent. The reaction of syn-[2]2+ with [AuCl{S(CH2CH2OH)2}] led to the formation of an S-bridged CoIII4PtII2AuI2 octanuclear metallacycle, [Au2{Pt[Co(aet)3]2}2]6+
([3]6+), while the corresponding reaction of anti-[2]2+ afforded a different product ({[4]3+}n) that is assumed to have a polymeric structure in {[Au{Pt[Co(aet)3]2}]3+}n.
You have access to this article
Please wait while we load your content...
Something went wrong. Try again?