A series of 5-aryl-3-ferrocenyl dihydropyrazole compounds were synthesized by using acetylferrocene.The structures of these compounds were characterized by IR,1H NMR spectra and MS.The crystal structure of compound 2a was determined by X-ray single crystal diffraction.The compound 2a belongs to the triclinic,space group P1,with a=10.203(6),b=10.447(7),c=11.557(8),α=96.80(3)°,β=116.05(2)°,γ=92.72(2)°,V=1092.1(12)3,Z=2,F(000)=412,Dc=1.353 g/cm3,μ=1.479 mm-1,and the final R1=0.0381,wR2=0.0834.
