【摘要】 <正> 在前报中,从对η⁶-苯钐配合物Sm（η⁶-C₆H₅）（η²-AlCl₄）₃的晶体结构测定,得到配合物中Sm-C键平均键长为2.92 ,这一结果,与Cotton报道的Sm（η⁶-C₆Me₆）（η⁶-AICI₄）₃中的Sm-C键平均键长（2.89 ）相比,明显地增大了。可见,配体芳烃与相应的稀土有机配合物的结构有着密切的关系。为了进一步了解苯环上甲基取代数目对这类配合物结构的影响规律,我们以甲苯为配体,研究了η⁶-甲苯钐有机配合物的合成及晶体结构。更多还原

【Abstract】 Sm（η⁶-CH₃C₆H₅）（η²-AlCl₄）₃ was prepared by reacting activated AlCl₃ and alumi- num powder with SmCl₃ in toluene. The X-ray Structure was determined. The crystal of the title compound crystallizes in monoclinic space group P2₁/n, with a=9.710（2） , b= 19.844（2） , c=12.885（2） , β=103.85（1） , V=2410.51 ₂, Z=4. The structure was solved by Rant method and block martrix least-square techniques, followed by Fourier synthesis for 3782 reflections with I>3ρ（Ⅰ）, final R=0.051. The center metal atom Sm （Ⅲ） bonds to six carbon atoms in the toluene ring and six chlorine atoms. The average Sm-C distance and Sm-Cl distance are 2.91 and 2.84 , respectively. The deviation between the six Sm-C distances is much larger than that in Sm（η⁶-C₆H₆）（η²-AlCl₄）₃, this is due to the steric interaction between the methyl group in the toluene ring and the equatorial chlorine atoms.更多还原