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Complex La(NO3)3(Benzo-15-C-5) (C14H20LaN3O14, Mt= 593. 28) crystallizes in the orthorhombic,space group P212121 with a=8. 393(2),b= 16. 624(5), c = 17. 326(4) A ,V = 2417. 6(6) A3,Z = 4,DC= 1. 63gcm-3,F(000) = 1176, μ= 18. 7cm~1(MoKa). The final refinement converged with R = 0. 060 and Rw=0. 065 for 2223observed independent reflections. Complex La ( NO3 )3 ( Cyclohexyl- 15- C- 5 ) (C14H26LaN3O14,MT = 599. 34) is monoclinic,P21/n space group with a=9. 917(4),b= 13. 667(5),c=16. 763(5)A,β=104. 33(3),V = 2201(1)A3,Z=4,Dc=1.81gcm-3, F(000) = 1200,μ= 20. 4cm-1(MoKa).The final refinement converged with R=0. 048 and Rw=0. 036 for 1495 observed independent reflections. In the two complexes,the La (Ⅲ) ion is 11-coordinate and bonded to six oxygen atoms from three bidentate nitrate groups and five oxygen atoms from the crown ether. The average bond lengths of La -O (crown) and La -O(nitrate)are 2. 68 and 2. 61A for La(NO3)3(Benzo-15-C-5) ,re-snectively and 2. 71 and 2. 62 A for La(NO3)3(Cyclohexyl-15-C-5) re
Crystallizes in the orthorhombic, space group P212121 with a = 8. 393 (2), b = 16. 624 (5) Complex La (NO3) 3 (Benzo-15-C-5) (C14H20LaN3O14, Mt = 593.28) (MoKa), c = 17. 326 (4) A, V = 2417. 6 (6) A3, Z = 4, DC = 1.63gcm-3, F . The final refinement converged with R = 0.060 and Rw = 0.065 for 2223observed independent reflections. Complex La (NO3) 3 (Cyclohexyl- 15- C- 5) (C14H26LaN3O14, MT = 599. 34) is monoclinic, P21 / n space group with a = 9 917 (4), b = 13. 667 (5), c = 16 763 (5) A, β = 104.33 (3), V = 2201 A3, 0.48 and Rw = 0. 036 for 1495 observed independent reflections (Z = 4), Dc = 1.81 gcm-3, F In the two complexes, the La (III) ion is 11-coordinate and bonded to six oxygen atoms from three bidentate nitrate groups and five oxygen atoms from the crown ether. The average bond lengths of La-O (crown) and La- (Nitrate) are 2. 68 and 2. 61A for La (NO3) 3 (Benzo-15-C-5), re-snely and 2.71 and 2.62 A for La clohexyl-15-C-5) re