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Two cyano bridged dimeric 4f 3d complexes [Nd(DMF) 4(H 2O) 3Co(CN) 6]·H 2O (A) and [Sm(pyr) 4(H 2O) 3Cr(CN) 6]·2H 2O (B) (DMF=N,N dimethylformamide, pyr=2 pyrrolidone) were prepared and structurally characterized. Single crystal X ray diffraction analysis revealed that the complexes contain cyano bridged 3 and [Ln(L) 4(H 2O) 3] 3+ groups. The Ln 3+ is eight coordinate, and is coordinated by seven oxygen atoms of three water molecules and four organic ligands (DMF or pyr). Each terminal CN ligand of the 3- entity is hydrogen bonded to some oxygen atoms of the coordinated water molecules yielding a hydrogen bonded three dimensional network. Crystal data for A: monoclinic, space group P 2(1)/ n , a = 1.7525(4) nm, b =0.8879(2) nm, c =1.9876(4) nm, β =95.92(3)°, V =3.0763(12) nm 3, Z =4, D c= 1.563 mg·m -3 . Complex B crystallizes in the P 1 space group, with lattice parameters of a =1.22720(4) nm, b =1.45550(8) nm, c =0.91310(4) nm, α =92.5869(17)°, β = 90.9569(12)°, γ =89.822(3)°, V =1.62908(13) nm 3, Z =2, D c=1.608 mg·m -3 .
Two cyano bridged dimeric 4f 3d complexes [Nd (DMF) 4 (H 2 O) 3Co (CN) 6] · H 2O (A) and [Sm (pyr) 4 (H 2O) Single crystal X ray diffraction analysis revealed that the complexes contain cyano-bridged 3 and [Ln (L) 4 (H 2O) 3] 3+ groups. The Ln 3+ is eight coordinate, and is coordinated by seven oxygen atoms of three water molecules and four organic ligands (DMF or pyr). Each terminal CN ligand of the 3- entity is hydrogen bonded to some oxygen atoms of the coordinated Crystal data for A: monoclinic, space group P 2 (1) / n, a = 1.7525 (4) nm, b = 0.8879 (2) nm, c = 1.9876 (4) nm , β = 95.92 (3) °, V = 3.0763 (12) nm 3, Z = 4, D c = 1.563 mg · m -3 Complex B crystallizes in the P 1 space group, with lattice parameters of a = 1.22720 4) nm, b = 1.45550 (8) nm, c = 0.91310 (4) nm, α = 92.5869 (17) °, β = 90.9569 (12) °, γ = 89.822 (3) °, V = 1.62908 (13) nm 3, Z = 2 , D c = 1.608 mg · m -3.