Haiges* R, Boatz JA, Vij A, Vij V, Gerken M, Schneider S, Schroer T, Yousufuddin M, Christe* KO. Polyazide Chemistry. Preparation and Characterization of As(N3)5, Sb(N3)5, and [P(C6H5)4][Sb(N3)6]. Angewandte Chemie, International Edition, English. 2004;43:6676-6680.