New Energetic Complexes of Copper(II) and the Acetone Carbohydrazide Schiff Base as Potential Flame Colorants for Pyrotechnic Mixtures

Abstract

The drive to find viable alternatives to common explosives has resulted in increased interest in the development of new transition‐metal organometallic energetic materials. To this end we report on the synthesis and characterization of the new energetic compounds, [CuX2(C7H14N4O)2·H2O] (X = ClO4–; NO3–), in addition to a new pathway to synthesizing copper hydrazinium chloride (CuCl3– N2H5+) in a clean facile way. All three complexes were characterized by low temperature single‐crystal X‐ray diffraction, while the two new compounds were also characterized by elemental analysis, thermogravimetric analysis, and differential scanning calorimetry. Because of the energetic nature of the new compounds, drop hammer and spark ignition tests were performed; Cu(NO3)2(C7H14N4O)2 was insensitive to both and Cu(ClO4)2(C7H14N4O)2 proved to be shock sensitive at high impact forces. It is expected that both of the compounds could be utilized in pyrotechnics as generators of green and blue colors, respectively.

Variations in the Interplay of Intermetallic and Metal Chalcogenide Units in Organotin–Copper Selenide Clusters

“…The most striking deviation from the structure of 1 , however, is the presence of an N 2 H 4 group that is bound to one of the Cu atoms. Only six Cu-bound hydrazine derivatives have been reported to date, two of which are inorganic polymers. − The Cu–N distance in 2 [2.126(19) Å] is within the range of those reported in the literature (ranging from 1.95(2) Å in [{Cu­(CN)} 2 (μ-N 2 H 4 )] n to 2.2526(17) Å in [N 2 H 5 Cu­(HEDTA)]­H 2 O), and the N1–N2 distance of 1.42(3) Å is within the normal range for a N–N single bond. The Cu3 atom is surrounded by four atoms in a distorted tetrahedral manner (average bond angle: 108.85°).…”

Metal complexes driven from Schiff bases and semicarbazones for biomedical and allied applications: a review

“…; in pharmaceuticals; and as catalyst [53] They are also used in dyes [54], polymers, [54] as well as they are applied in nanotechnology [55], laser [56], transistor [57], in defense as gas generating agents [58], and pyrotechnic mixtures [59]. ; in pharmaceuticals; and as catalyst [53] They are also used in dyes [54], polymers, [54] as well as they are applied in nanotechnology [55], laser [56], transistor [57], in defense as gas generating agents [58], and pyrotechnic mixtures [59].…”

Copper

“…À ), confirming formation of the smaller metallacycle. 82 These compounds are potentially energetic, although drop hammer and spark ignition tests on the nitrate showed no violent discharge; their application as generators of green (nitrate) and blue (perchlorate) colours in pyrotechnics is being examined. A copper-based tripodal complex has been used in a study of perrhenate ion binding; a central Cu 3 (m 3 -ReO 4 ) cluster was observed in the solid-state (8) involving intermolecular coordination from three distinct units to the oxyanion.…”