Three compounds were synthesized and characterized by elemental analysis, IR spectra and ^1H NMR spectra. The crystal and molecular structures of C~1~9H~1~8FeO~2 were determinded by single-crystal X-ray diffraction. The unit-cell is monoclinic, space group P 2~1/n with a=0.6022(1), b=2.735(1), c=0.9416(1)nm, β=99.02(1)°, V=1.532(1)(nm)^3, Mr=334.20, Z=4, Dx=1.45g/cm^3, μ=9.68cm^-^1, F(000)=696.

Key words: METHANE P, CYCLODEXTRIN, FORMYL, CRYSTAL STRUCTURE OF ORGANIC SUBSTANCE, HYDROXYL COMPOUNDS, ACETONE, ORGANIC SYNTHESIS, CONDENSATION REACTION, STRUCTURAL ANALYSIS, NITRO COMPOUNDS