(4,4,12,12-Tetramethyl-5,8,11-triazapenta-2,14-dione 2-oxime 14-oximato-κ⁵N)copper(II) perchlorate: a copper(II) compound with a pentadentate triamine–oxime–oximate ligand

Abstract

The title compound, [Cu(C(16)H(34)N(5)O(2))]ClO(4), has discrete square-pyramidal (triamine-oxime-oximato)copper(II) cations and perchlorate anions. The cations have very approximate mirror symmetry, with the oxime [Cu-N = 2.066 (2) A], oximate [Cu-N = 2.087 (2) A] and amine N atoms [Cu-N = 2.138 (2) and 2.095 (2) A] in the tetrahedrally twisted basal plane, and the 'central' amine N atom coordinated axially [Cu-N = 2.183 (2) A]. The oxime and oximate groups are linked by an O-H.O hydrogen bond, forming a pseudo-cyclic pentadentate ligand, with an O.O distance of 2.395 (3) A.

Use of the oxime–oximato binding mode to stabilise mixed valence copper iodide polymer networks using dipyridyl ketone oxime ligands

“…25 The two L 23 entities in the asymmetric unit, formed a bridged intramolecular oxime-oximato hydrogen bond. [26][27][28][29][30] The O-H⋯O distances were found to be 1.06 (11) and 1.39(11) Å (corresponding to an O⋯O distance of 2.427(9) Å). The hydrogen was shared roughly equally between the two oxygen atoms, reflecting the strong oximeoximato bridge.…”

“…The two L 24 entities formed a bridged intramolecular oxime-oximato hydrogen bond. [26][27][28][29][30] The O-H⋯ O distances were found to be 1.11(3) and 1.34(3) Å (corresponding to an O⋯O distance of 2.445(2) Å). In this case, the hydrogen is asymmetrically shared between the two oxygen atoms, again giving rise to a strong motif.…”