Metal Derivatives of 1,3‐Imidazolidine‐2‐thione with Divalent d 10 Metal Ions (Zn–Hg) : Synthesis and Structures

Reactions of divalent Zn‐Hg metal ions with 1,3‐imidazolidine‐2‐thione (imdtH 2 ) in 1 : 2 molar ratio have formed monomeric complexes, [Zn(η 1 ‐S‐imdtH 2 ) 2 (OAc) 2 ] ( 1 ), [Cd((η 1 ‐SimdtH 2 ) 2 I 2 ] ( 2 ), [Cd(η 1 ‐S‐imdtH 2 ) 2 Br 2 ] ( 3 ), and [Hg(η 1 ‐S‐imdtH 2 ) 2 I 2 ] ( 4 ). Complexes 1 – 4 , have been characterized by elemental analysis (C, H, N), spectroscopy (IR, 1 H, NMR) and x‐ray crystallography ( 1 ‐ 4 ). Hydrogen bonding between oxygen of acetate and imino hydrogen of ligand, {N(2)–H(2C)···O(2) # } in 1 , ring CH and imino hydrogen, {C(2A)–H(2A)···Br(2) # } in 3 have formed H‐bonded dimers. Similarly, the interactions between molecular units of complexes 2 and 4 have yielded 2D polymers. The polymerization occurs via intermolecular interactions between thione sulfur and imino hydrogen, {N(2)–H(2)···S(1) # }, imino hydrogen and the iodine atom, {NH(1)···I(2) # } in 2 and imino hydrogen – iodine atom {N(2A)–H(2A)···I(2)} and I···I interaction in 4 . Crystal data: [Zn(η 1 ‐S‐imdtH 2 ) 2 (OAc) 2 ] ( 1 ), C 10 H 18 N 4 O 4 S 2 Zn, orthorhombic, Pbcn , a = 9.3854(7) Å, b = 12.4647(10) Å, c = 13.2263(11) Å; V = 1547.3(2) Å 3 , Z = 4, R = 0.0280 [Cd((η 1 ‐S‐imdtH 2 ) 2 I 2 ] ( 2 ), C 6 H 12 CdI 2 N 4 S 2 , orthorhombic, Pnma , a = 13.8487(10) Å, b = 14.4232(11) Å, c = 7.0659(5) Å; Z = 4, V = 1411.36(18) Å 3 , R = 0.0186.