The　reaction　of　alpha,beta-unsaturated　ketones　of　2,2-diferrocenylpropane　with　hydrazine　led　to　the　formation　of　2,2-diferrocenylpropane-substituted　dihydropyrazole.　The　further　reaction　of　dihydropyrazole　with　p-pyridinecarboxylic　acid　chloride　or　benzoyl　chloride　resulted　in　the　isolation　of　two　novel　2,2-diferrocenylpropane-substituted　acyl　dihydropyrazole　derivatives.　All　of　these　compounds　were　analyzed　by　MS,　IR　and　H-1　NMR　spectra.　The　crystal　structure　of　representative　compound,　1-p-pyridine　acyl-3-ferrocenyl-5-(2,2-diferrocenylpropane)-4,5-dihydropyrazole　(5a)　has　been　elucidated　by　X-ray　diffraction.　The　electrochemical　behaviours　of　all　the　compounds　have　been　examined.　(C)　2011　Elsevier　B.　V.　All　rights　reserved.