Cr(Ⅲ) Complexes of Tetraazamacrocycles Derived from $\alpha$-Diketones and Diaminoalkanes

Cr(Ⅲ) Complexes of Tetraazamacrocycles Derived from $\alpha$-Diketones and Diaminoalkanes

Template condensation of ${\alpha}$-diketones such as 2,3-butanedione or benzil with diaminoalkanes such as 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, 1,6-diaminohexane, 1,8-diaminooctane or 1,12-diaminododecane in the presence of Cr(III) results in the formation of complexes of the type $[CrI,X_2]X$ (where L = tetraazamacrocycle having 12 to 32-membered ring and $X={NO_3}^- or Cl^-).$ The complexes have been characterized by elemental analyses, magnetic measurements and IR and diffuse reflectance spectra.

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