Copper(I) thiocyanate networks with aromatic diimine ligands

Add time:07/31/2019    Source:sciencedirect.com

A total of five new CuSCN-LL complexes with aromatic diimine ligands, LL = quinoxaline (Qox), quinazoline (Qnz), phthalazine (Ptz), 2-aminopyrazine (2-NH2Pyz), and 2-methoxypyrazine (2-MeOPyz) have been prepared and characterized by crystallographic methods. The following compounds are reported: (CuSCN)2(Qox) (1), (CuSCN)(Qnz) (2), (CuSCN)2(Ptz) (3), (CuSCN)2(2-NH2Pyz) (4), and (CuSCN)(2-MeOPyz) (5). Compounds 1–4 were prepared using an extended aqueous reflux method in the presence of KSCN and ammonia. Compound 5 was prepared by directly reacting solid CuSCN with the liquid ligand. In complexes 2 and 5, LL is monodentate, while in others LL is bridging bidentate. All network structures are 2-D sheets, consisting of μ2-LL-crosslinked CuSCN ladders for 1 and 4, LL-decorated CuSCN sheets for 2 and 5, and unusual μ2-LL-“stapled” sheets for 3.

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