Three azido-bridged copper(II) complexes, [Cu-2(L-1)(2)(mu(1,1,3)-N-3)(2)](n)center dot 2nH(2)O (1), [Cu-4(L-2)(4)(mu(1,1)-N-3)(2)(mu(1,1,3)-N-3)(2)](n) (2), and [Cu-2(L-3)(2)(mu(1,1)-N-3)(2)] (3), where L-1, L-2, and L-3 are the deprotonated forms of 4-bromo-2-[(2-methylaminoethylimino)methyl]phenol (HL1), 4-bromo-2-[(2-ethylaminoethylimino)methyl]phenol (HL2), and 4-bromo-2-[(2-isopropylaminoethylimino)methyl]phenol (HL3), respectively, have been prepared and structurally characterized by single-crystal X-ray diffraction analysis and IR spectra. The slight differences in the terminal groups of the Schiff bases lead to different bridging modes of the azido groups.