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The title Zn II complex, [Zn(C 19 H 20 N 3 OS) 2 ] {systematic name: bis-[( N -ethyl- N '-{( Z )-[(2 E )-3-(4-meth-oxy-phen-yl)-1-phenyl-prop-2-en-1-yl-idene]amino}-carb-am-im-id-o-yl)sulfanido]zinc(II)}, features a tetra-hedrally coordinated Zn II ion within an N 2 S 2 donor set provided by two N , S -chelating thio-semicarbazone anions. The resulting five-membered Zn,C,N 2 ,S chelate rings adopt different conformations, i.e . almost planar and an envelope with the Zn atom being the flap atom. The configuration about the imine bond within the chelate ring is Z but those about the exocyclic imine and ethyl-ene bonds are E . In the crystal, supra-molecular [100] chains mediated by thio-amide-N-H⋯S(thione) hydrogen bonds and eight-membered thio-amide {⋯HNCS} 2 synthons are observed. A range of inter-actions, including C-H⋯O, C-H⋯π, C-H⋯π(chelate ring) and π(meth-oxy-benzene)-π(chelate ring) consolidate the packing. The Hirshfeld surface analysis performed on the title complex also indicates the influence of the inter-actions involving the chelate rings upon the packing along with the more conventional contacts.

acta crystallographica. section e, crystallographic communications

Bis(4-methoxychalcone 4-ethylthiosemicarbazonato-κ2 N 1,S)zinc(II): crystal structure and Hirshfeld surface analysis