Syntheses of(C_8H_8)Ln(C_9H_7)·(THF)_2(Ln=Pr,Nd)and crystal structure of(C_8H_8)Pr(C_9H_7)·(THF)_2

This paper reports two lanthanide complexes of formula (C_9H_7)Ln(C_8H_8)·(THF)_2 whereLn is Pr or Nd,C_9H_7 is indenyl,and C_8H_8 is cyclooctatetraene (COT).The complexes were preparedby the reaction of LnCl_3 with K(C_9H_7) and K_2(C_8H_8) in THF.(C_9H_7)Pr(C_8H_8)·(THF)_2 crystallizes inTHF at - 15℃ in the monoclinic space group P2_1:with unit cell dimensions a=8.446(0),b=10.083(2),c=13.407(3),β=105.48(1)°,V=1100.43(35)~3,Dc=1.52g/cm~3 and Z=2.The final R valueis 0.033,R_w value is 0.030,respectively.In (C_9H_7)Pr(C_8H_8)·(THF)_2 a five-membered ring centroid ofC_9H_7,the C_8H_8 ring centroid and the two oxygen atoms from the two THF molecules form a distortedtetrahedral geometry around the metal.

Syntheses of (C8H8)Ln(C9H7) · (THF)2(Ln = Pr,Nd) and crystal structure of (C8H8)Pr(C9H7) · (THF)2

This paper reports two lanthanide complexes of formula (C₉,H₇)Ln(C₈H₈) · (THF)₂ where Ln is Pr or Nd, C₉H₇ is indenyl, and C₈H₈ is cyclooctatetraene (COT). The complexes were prepared by the reaction of LnCl₂ with K(C₉H₇) and K₂(C₂H₂) in THF. (C₉H₇)Pr(C₈H₈) · (THF)₂ crystallizes in THF at ?15°C in the monoclinic space group P2₁² with unit cell dimensions a = 8.446 (0), b = 10.083(2), c = 13.407 (3)Å, β = 105.48 (1)°, V = 1100.43 (35)Ų, D_c = 1.52 g / cm³ and Z = 2. The final R value is 0.033, R_w value is 0.030, respectively. In (C₉H₇)Pr(C₈H₈) · (THF)₂ a five-membered ring centroid of C, the C₈H₈ ring centroid and the two oxygen atoms from the two THF molecules form a distorted tetrahedral geometry around the metal.