Syntheses of (C_5H_9C_5H_4)_2LnCl(THF)_n (Ln=Nd, Sm, Er, Yb) and crystal structure of [(C_5H_9C_5H_4)_2-LnCl(THF)_n]_2(Ln=Sm, n=1; Ln=Er, n=0)

Reactions of lanthanoid trichlorides with sodium cyclopentylcyclopentadienyl in THFafford bis(cyclopentylcyclopentadienyl) lanthanoid chloride complexes (C_5H_9C_5H_4)_2LnCl(THF)_n (Ln=Nd, Sm, n=1; Ln= Er, Yb, n= 0). The compound [CP'_2SmCl(THF)]_2 (2) (Cp' =cyclopentylcy-clopentadienyl) crystallizes from mixed solvent of hexane and THF in monoclinic space group P_2_1/cwith a = 11.583 (3), b = 23.019(6), c = 8.227 (2), β= 90.26 (2)°, V= 2194 (1)~3, D_c= 1.59 g/cm~3.μ= 28.6 cm~(-1), F(000) = 1060, Z= 2 (dimers). Its crystal molecule is a dimer with a crystallographicsymmetry center. The central metal atom Sm is coordinated to two Cp' rings, two bridging chlorineatoms and one THF forming a distorted trigonal bipyramid. The crystal of [Cp'_2ErCl]_2 (3) belongs tothe triclinic space group P with a = 11.264 (2), b= 13.296(5), c = 14.296(6), a = 96.99 (3), β=112.47(2), γ= 102.78(2)°, V= 1865(1)~3, D_c= 1.67 g /cm~3, μ= 48.0 cm~(-1), F(000) = 924, Z = 2 (dimers).The molecule is a dimer consisting of two Cp'_2 ErCl species bridged by two Cl atoms. The centralmetal atom Er is coordinated to two Cp' rings and two bridging chlorine atoms forming a pseudo-tetrahedron. All these complexes are soluble in THF, DME, Et_2O, toluene and hexane.

Syntheses of (C5H9C5H4)2LnCl(THF)n (Ln = Nd,Sm, Er,Yb) and crystal structure of [(C5H9C5H4)2-LnCl(THF)n]2(Ln = Sm,n = 1; Ln = Er,n = 0)

Reactions of lanthanoid trichlorides with sodium cyclopentylcyclopentadienyl in THF afford bis(cyclopentylcyclopentadienyl)lanthanoid chloride complexes (C₂H₉C₅H₄)₂ LnCl(THF)_n (Ln = Nd, Sm, n = 1; Ln = Er, Yb, n = 0). The compound [Cp'₂SmCl(THF)]₂ (2) (Cp' = cyclopentylcyclopentadienyl) crystallizes from mixed solvent of hexane and THF in monoclinic space group P2₁/c with a = 11.583 (3), b = 23.019(6), c = 8.227 (2) Å, β = 90.26 (2)°, V= 2194 (1)Ų, D_c = 1.59 g / cm³, μ = 28.6 cm^?1, F(000) = 1060, Z = 2 (dimers). Its crystal molecule is a dimer with a crystallographic symmetry center. The central metal atom Sm is coordinated to two Cp' rings, two bridging chlorine atoms and one THF forming a distorted trigonal bipyramid. The crystal of [Cp'₂ErCl]₃ (3) belongs to the triclinic space group P1 with a = 11.264 (2), b = 13.296(5), c = 14.296(6)Å, α = 96.99 (3), β = 112.47(2), γ = 102.78(2)°, V = 1865(1)Ų, D_e = 1.67 g / cm², μ = 48.0 cm^?1, F(000) = 924, Z = 2 (dimers). The molecule is a dimer consisting of two Cp'₂ ErCl species bridged by two Cl atoms. The central metal atom Er is coordinated to two Cp' rings and two bridging chlorine atoms forming a pseudotetrahedron. All these complexes are soluble in THF, DME, Et₂O, toluene and hexane.