An Unusual Open Cubane Structure in aμ1,1-Azido- and Alkoxo-Bridged Tetranuclear Copper(II) Complex, [Cu4L2(μ1,1-N3)2]·5H2O (H3L =N,N‘-(2-Hydroxylpropane-1,3-diyl)bis-salicylideneimine) | Publicación