“…In one of the earliest studies, Thiele described a complex salt of copper with the formula [Cu(AG) 2 ](NO 3 ) 2 , . Similar square‐planar chelate structures have been attributed to complexes of nickel(II), platinum(II), and palladium(II) , . Many energetic nitrogen‐rich aminonitroguanidine (ANQ), containing transition metal salts, M 2+ (ANQ) 2 X 2 (H 2 O)y ( M 2+ = Co, Ni, Cu, Zn; X = nitrate, perchlorate, and dinitramide) were synthesized and characterized as energetic materials .…”