Syntheses and Crystal Structures of Two End-On Thiocyanato-Bridged Dinuclear Copper(II) Complexes Derived from 2-[(2-Ethylaminoethylimino)methyl]phenol and 2,4-Dichloro-6-[(2-methylaminoethylimino)methyl]phenol

Abstract

The reaction among copper(II) acetate with ammonium thiocyanate and the similar tridentate Schiff bases 2-[(2-ethylaminoethylimino)methyl]phenol (HL1) and 2,4-dichloro-6-[(2-methylaminoethylimino)methyl]phenol (HL2) produces two end-on thiocyanato-bridged dinuclear copper(II) complexes, [Cu₂(L1)₂(NCS)₂] (1), and [Cu₂(L2)₂(NCS)₂] (2). Each copper atom in the complexes is in a square pyramidal coordination. The Cu…Cu distances are 3.217(2) and 3.317(2) Å in (1), and 3.270(2) Å in (2), respectively.

Keywords:

• copper complex
• crystal structure
• schiff base
• synthesis

Notes

^a R ₁ = ∑ ‖F _o |–|F _c ‖/∑|F _o |, wR ₂ = [∑ w(F _o ² – F _c ²)²/∑ w(F _o ²)²]^1/2, w ₍₁₎ = [σ ²(F _o )²+ (0.0522 (F _o ²+ 2F _c ²)/3)²+ 0.1187(F _o ²+ 2F _c ²)/3]^–1, w ₍₂₎ = [σ ²(F _o )²+ (0.0455(F _o ²+ 2F _c ²)/3)²+ 1.2687(F _o ²+ 2F _c ²)/3]^–1.