Dihydropyrazole-bridged　dinuclear　ferrocenyl　derivatives　(3a-3c)　have　been　synthesized　by　the　reaction　of　1,3-diferrocenyl-2propen-1-on(1)　with　hydrazine,　then　acylation　with　acyl　chloride　directly.　The　structures　were　determined　by　mass　spectrometry,　IR　and　H-1　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　degrees　C,　respectively.　Copyright　(C)　2011　John　Wiley　&　Sons,　Ltd.