Incorporation of in situ generated 3,3'-(sulfane-diyl)bis-(1-methyl-1,3-imidazolidine-2-thione) into a one-dimensional CuI coordination polymer with sulfur-bridged {CuI 4S10} n central cores

Abstract

The reaction of [Cu(CH₃CN)₄](BF₄) with 1-methyl-1,3-imidazolidine-2-thione {SC₃H₄(NMe)NH}, under aerobic conditions at room temperature, yielded an unusual one-dimensional coordination polymer, namely, catena-poly[[[(1-meth-yl-1,3-imidazolidine-2-thione-κS)copper(I)]-μ-(1-methyl-1,3-imidazolidine-2-thione)-κ² S:S-copper(I)-μ-[3,3'-(sulfanedi-yl)bis-(1-methyl-1,3-imidazolidine-2-thione)]-κ⁵ S,S',S'':S,S''] bis-(tetra-fluorido-borate)], {[Cu₂(C₄H₈N₂S)₂(C₈H₁₄N₄S₃)](BF₄)₂} _n or [Cu₄(κ⁵:L ¹-N-S-N-L ¹)₂(κ¹:L ¹-NH)₂(κ²:L ¹-NH)₂] _n (BF₄)_4n 1 [L ¹ = SC₃ H₄(NMe)NH] with sulfur-bridged {Cu^I ₄S₁₀} _n central cores. The in situ generated bis-(1-methyl-1,3-imidazolidinyl-2-thione) sulfide [{SC₃H₄(NMe)NSN(NMe)C₃H₄S; abbrev. L ¹-N-S-N-L ¹] ligand, in combin-ation with 1-methyl-1,3-imidazolidine-2-thione (L ¹-NH) ligands, construct this coordination polymer. Each Cu^I ion is bonded to four sulfur donor atoms in a distorted tetra-hedral geometry and the formation of this polymer solely by sulfur donor atoms with {Cu^I ₄S₁₀} _n central cores, is the first such example in copper-heterocyclic-2-thione chemistry.

Keywords: copper(I) thione complex; crystal structure; one-dimensional coordination polymer.