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Two new one-dimensional (1-D) end-to-end azido and thiocyanato bridged Cu(II) coordination polymers, [Cu(L)(µ-1,3-N 3 )]n(ClO 4 )n( 1 ) and [Cu(L)(µ-1,3-NCS)]n(ClO 4 )n( 2 ) with a morpholine-based tridentate  N , N , N -donor Schiff base ligand (1-methyl-1 H -imidazol-2-yl)-N-[2-(morpholin-4-yl)ethyl]methanimine, L) have been synthesized. Compounds  1  and  2  have been characterized by elemental analyses and spectroscopic techniques. The X-ray single crystal structures of  1  and  2  show the formation of regular zigzag chains with µ-1,3-azido and µ-1,3-thiocyanate bridges, respectively. Variable temperature (2–300 K) magnetic studies indicate that  1  shows a ferromagnetic intrachain exchange interaction with  g  = 2.135(2) and  J  = 2.13(2) cm −1 , while in  2  this interaction is antiferromagnetic with  g  = 2.1412(3) and  J  = –0.277(2) cm −1 . X-band EPR spectra of  1  and  2  in frozen (143 K) DMF solution corroborate our magnetic studies.

Syntheses of two copper(II) coordination polymers from a morpholine-based tridentate Schiff base ligand: crystal structures and magnetic properties