N-Substituted salicylaldimine complexes of chromium(III)

Tris(salicylaldehydato)chromium(111) reacts readily with primary amines or ammonia to give complexes of the form Cr(sal-NR)3 where R = n-C3H9, i-C4H9, p-C6H4CH3, p-C6H4Br. The complexes are monomeric in benzene, and have magnetic moments in the range 3.77-3.81 B.M. at room temperature. Crystal field splitting energies have been obtained for the complexes from their spectra. Ethylenediamine reacts with the salicylaldehyde complex to give a cationic complex containing the tridentate ligand -0-C6H4-CH=NCH2CH2-NH2.