{Ba[Au(SCN)(2)](2)}(n): a three-dimensional net comprised of monomeric and trimeric gold(I) units.

The noteworthy structural feature of the title complex, poly[acetonitrile-tetra-μ(2)-thio-cyanato-barium(II)digold(I)], {[Au(2)Ba(SCN)(4)(CH(3)CN)]}(n), is that the bis-(thio-cyanato)-aurate(I) anion adopts both monomeric and trimeric motifs. The trimer unit has an Au⋯Au distance of 3.1687 (3) Å.

catena-Poly[[(6,7,9,10,17,18,20,21-octa-hydro-5,8,11,16,19,22-hexa-oxadibenzo[a,j]cyclo-octa-decene)barium]-di-μ-thio-cyanato-[thio-cyanato-diaurate(I)(Au-Au)]-μ-thio-cyanato].

In the title compound, [Au(2)Ba(NCS)(4)(C(20)H(24)O(6))](n), the dithio--cyanato-aurate(I) anion adopts a dimeric structure with an Au⋯Au distance of 3.1109 (10) Å; both Au(I) atoms are also bonded to two S atoms. The Ba(II) ion adopts an irregular BaN(3)O(6) geometry, arising from the crown ether and three adjacent thio-cyanate N atoms; the extended structure of the complex can be described as a one-dimensional coordination polymer generated by the Ba⋯N inter-actions (two on the endo side and one on the exo side of the crown ether) running parallel to the b axis, with an anti-parallel arrangement of ribbons in the unit cell.