Synthesis And Characterization Of P-Alkoxylphenyl Ferrocenyl β-Diketone And Its Complex

With the development of the scientific technology, liquid crystal has been usedwidely in science and industry. In particular, ferrocene-containingβ-diketonetransition metal complexes showed remarkable thermal stability and mesomorphiccharacter.The ketone-ester condensation of actylferrocene and methyl p-alkoxy benzonateafforded the five novel p-n-alkoxylphenyl ferrocenylβ-diketone compound andthese Iigands afforded some complexes with transition metal (Co,Ni,Cu,Zn), allcompounds has been characterized by element analysis, IR and ¹H NMRspectroscopies.Two kinds of crystals was recrystallized using petroleum ether anddichloromethane by slow evaporation at room temperature. The crystal structure oftheβ-diketone and its complex has also been determined by single crystal X-raydiffraction technique. It was found that theβ-diketone compound crystallized in amondinic P2₁/c space group and a=18.5985(14) (?), b=10.5710(8) (?), c=12.0814(10) (?), a=90°,β= 95.1050(10)°,γ= 90°, V= 2365.8(3) (?)³, Z=4, Dc=1.293 mg·m^-3,μ=0.662 mm^-1, F(000)=976. It was found that the complexcrystallized in a mondinic P2₁/c space group and a=21.437(2) (?), b=9.7129(10)(?), c=25.935(3) (?), a=90°,β=99.085(2)°,γ=90°, V=5332.5(10)(?)³, Z=4,Dc=1.329 mg·m^-3,μ=1.079 mm^-1, F(000)=2228. Their phase transitions of liquid crystal were studied by polarizing Opticalmicroscope (POM)and differential scanning calorimetry(DSC). We foundp-octadecanalkoxyl phenyl ferrocenylβ-diketone and its complex of copper(â…¡) aresmectic thermotropic liquid crystal because its length-diameter ratio is above four.