Synthesis of dihydropyrazole-bridged dinuclear ferrocenyl derivatives and their catalytic effect on thermal decomposition of ammonium perchlorate

Dihydropyrazole-bridged dinuclear ferrocenyl derivatives (3a-3c) have been synthesized by the reaction of 1,3-diferrocenyl-2-propen-1-on (1) with hydrazine, then acylation with acyl chloride directly. The structures were determined by mass spectrometry, IR and ¹H NMR spectroscopy. The compound 3c was characterized by single-crystal X-ray analyses. It was found that compounds 3a-3c have significant catalytic effect on the decomposition of ammonium perchlorate (AP). Compared with the thermal decomposition of pure AP, adding 3a, 3b and 3c in AP decreases its decomposition temperature by 78.8, 74.3 and 57.1 °C, respectively.