B₁₂H₁₂^2–‐Based Metal (Cu²⁺, Ni²⁺, Zn²⁺) Complexes as Hypergolic Fuels with Superior Hypergolicity

Abstract

In hypergolic propellants, hypergolicity is an extremely important parameter in evaluating fuels. In this study, a new family of hypergolic metal (Cu 2+ , Ni 2+ , Zn 2+ ) complexes with B 12 H 12 2were synthesized and fully characterized. Two of these six complexes exhibited ultrashort ignition delay times [a]

Vinylimidazole coordination modes to Pt and Au metal centers

“…Typically, these have two or four vinylimidazole ligands. [26][27][28][29][30][31][32][33][34][35][36][37] The catena compounds, where Cu centers with 1-vinylimidazole ligands and ReCl 6 -units are connected through chloro bridges, have shown magnetic properties. 38 Surprisingly, no compounds of Ag or Au have been reported.…”

[Bis(imidazolyl)–BH2]+[Bis(triazolyl)–BH2]− Ionic Liquids with High Density and Energy Capacity

“…To date, many kinds of HILs have been developed, particularly B−H‐based HILs . Owing to their strong reducibility, B−H‐based anions usually play the part of the “hypergolic trigger” in HILs.…”

“…To date, many kinds of HILs have been developed, particularly BÀH-based HILs. [8][9][10][11] Owing to their strong reducibility,B ÀHbased anions usually play the part of the "hypergolic trigger" in HILs. However, their energy outputs are low,f or example, [BH 4 ] À (À62.19 kJ mol À1 ), [12] [BH 3 CN] À (À84.23 kJ mol À1 ), [13] [BH 2 (CN) 2 ] À (À70.87 kJ mol À1 ), [14] [BH 3 CNBH 2 CN] À (À141.71 kJ mol À1 ), [15] [PH 2 (BH 3 ) 2 ] À (À364.13 kJ mol À1 ), [16] and [B 6 H 7 ] À (À8.12 kJ mol À1 ).…”

“…All 1 Ha nd 13 Cc hemical shifts were measured relative to internal residual protons or carbon atoms in the lock solvents and are referenced to Me 4 Si (0.0 ppm). The 11 Bc hemical shifts were referenced to external BF 3 ·O(C 2 H 5 ) 2 (0.0 ppm) with an egative sign indicating an upfield shift. The glass-transition and decomposition points were recorded by using aM ettler-Toleto DSC1 calorimeter at a scan rate of 10 8Cmin À1 in closed aluminum containers.…”

Thermodynamic properties of the 2,4,6-triamine-1,3,5-triazine dodecahydro-closo-dodecaborate

“…, представленного одними из самых энергоемких химических элементов, вызывает интерес исследователей и практиков к его соединениям в качестве компонентов энергетических материалов различного назначения [5,[7][8][9][10][11][12][13]. Знание термодинамических характеристик соединений позволяет прогнозировать перспективность их практического применения в различных областях, а также использовать для теоретических расчетов возможности осуществления тех или иных химических реакций с их участием (окислительно-восстановительных, обменных и др.).…”