Abstract: | Reaction of Ndcl3 with AlCl3 and mesitylene in benzene gives complex Nd(η6‐1, 3, 5‐C6H3Me3)‐(AlCl4)3](C6H6) (1) which was characterized by elemental analysis, IR spectra, MS and X‐ray diffractions. The X‐ray determination indicates that 1 has a distorted pentagonal bipyramidal geometry and crystallizes in the monoclinic, space group P21/n with a = 0.9586(2), b = 1.1717(5), c = 2.8966(7) nm, β = 90.85 (2)°, V = 3.2529 (6) nm3,Dc= 1.573 g/cm3, Z = 4. A comparison of bond parameters for all the reported Ln (η6‐Ar) (AlCl4)3 complexes indicates that the bond distance of La? C is shortened with the increasing of methyl group on benzene and with the decreasing of radius of lanthanide ions. |