A Copper(II) Complex of a Macrocyclic Schiff Base Ligand with a Polyether Bridge

In the structure of aquachloro[7,10,13-trioxa3,17,23-triazabicyclo[17.3.1]tricosa-1 (23),2,17,19,21-pentaene-N,N',N'']copper(II) hexafluorophosphate acetonitrile solvate, the Cu^II ion is pentacoordinate with square-pyramidal coordination geometry, with a relatively long axial bond to water [2.244 (5) Å] and with the shortest Cu-N bond being to the pyridine N atom. The water molecule is also hydrogen bonded to two O atoms of the ligand. The complex is folded about the N-Cu-N axis, the polyether chain being nearly planar and making an angle of about 135° with the pyridine ring.

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