[Cr{tren(impy)₃}](ClO₄)₃, where tren(impy)₃ = N[CH₂CH₂N= C(H)(py)]₃

The structure of {tris[4-(2-pyridyl)-3-aza-3-butenyl]amine}chromium triperchlorate, [Cr{tren(impy)₃}](ClO₄)₃, [Cr(C₂₄H₂₇N₇)](ClO₄)₃, where tren(impy)₃ is N[CH₂CH₂N =C(H)(py)]₃, consists of [Cr{tren(impy)₃}]³⁺ cations in which the Cr^III centre adopts a distorted octahedral coordination geometry. The trigonal twist angle of 52° is close to that expected for octahedral Cr^III and there is little evidence suggesting coordination of the apical N atom on the tris(2-aminoethyl)amine backbone of the ligand.

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