Three new Schiff bases, \documentclass[12pt]{minimal}
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\begin{document}$$N,N'$$\end{document}-(bis(pyridin-2-yl)alkylidene)butane-1,4-diamine [(py)(R)C=N-(CH\documentclass[12pt]{minimal}
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\begin{document}$$_{2}$$\end{document})\documentclass[12pt]{minimal}
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\begin{document}$$_{4}\hbox{-}$$\end{document}N=C(R)(py), L: py = pyridine; R = H, \documentclass[12pt]{minimal}
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\begin{document}$$N,N^\prime$$\end{document}-(bis(pyridin-2-yl)formylidene)butane-1,4-diamine (bpfd); R = Me, \documentclass[12pt]{minimal}
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\begin{document}$$N,\!N^\prime$$\end{document}-(bis(pyridin-2-yl)methylidene)butane-1,4-diamine (bpmd); R = C\documentclass[12pt]{minimal}
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\begin{document}$$_{6}\rm{H}_{5}$$\end{document}, \documentclass[12pt]{minimal}
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\begin{document}$$N,N^\prime$$\end{document}-(bis(pyridin-2-yl)bezylidene)butane-1,4-diamine (bpbd)] were prepared and used to synthesize six dinuclear cadmium(II)azido complexes of type [Cd(L)(N\documentclass[12pt]{minimal}
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\begin{document}$$_{3}$$\end{document})]\documentclass[12pt]{minimal}
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\begin{document}$$_{2}$$\end{document}(Y)\documentclass[12pt]{minimal}
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\begin{document}$$_{2}$$\end{document} [L = bpfd, Y = ClO\documentclass[12pt]{minimal}
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\begin{document}$$_{4}$$\end{document} (1a); L = bpfd, Y = PF\documentclass[12pt]{minimal}
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\begin{document}$$_{6}{^-}$$\end{document} (1b); L = bpmd, Y = ClO\documentclass[12pt]{minimal}
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\begin{document}$$_{4}{^-}$$\end{document} (2a); L = bpmd, Y = PF\documentclass[12pt]{minimal}
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\begin{document}$$_{6}{^-}$$\end{document} (2b); L = bpbd, Y = ClO\documentclass[12pt]{minimal}
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\begin{document}$$_{4}{^-}$$\end{document} (3a); and L = bpbd, Y = PF\documentclass[12pt]{minimal}
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\begin{document}$$_{6}{^-}$$\end{document} (3b)]. Two representative members of the series, 3a and 3b, have been characterized by single crystal X-ray diffraction measurements. Structural study reveals that each cadmium center in both dinuclear compounds is located in a distorted octahedral coordination environment surrounded by six nitrogen atoms—four (N1, N2, N3, N4) from tetradentate ligand, and the fifth and sixth positions occupied by nitrogen atoms (N5, N5*) of doubly end-on bridging azides. The complexes display intraligand 1\documentclass[12pt]{minimal}
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\begin{document}$$(\pi\hbox{--}\pi^{*})$$\end{document} fluorescence and intraligand 3\documentclass[12pt]{minimal}
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\begin{document}$$(\pi\hbox{--}\pi^{*})$$\end{document} phosphorescence in glassy solutions (MeOH at 77 K).
