From polymeric chain compounds to dinuclear complexes via ligand hindrance: the synthesis and structures of lanthanide complexes of N-tolylsulfonyl amino acids

One-dimensional lanthanide coordination polymers with the formula [La2L6(H2O)4]n (L = N-p-tolylsulfonylalanate, 1) and dinuclear ternary complexes with the formula [LnL3(bipy)(H2O)]2 (Ln = Gd, Er, L = N-p-tolylsulfonylalanate, 2a–b; Ln = Er, Yb, L = N-p-tolylsulfonylglycinate, 3a–b) were synthesized. X-ray analysis reveals that compound 1 adopts a chain structure with alternating linkage of two and four bridging TsAla ligands between adjacent La(III) centers, while compounds 2a–b and 3a–b are dinuclear. Crystal data for 1: triclinic, P , a = 12.8689(18), b = 17.062(2), c = 18.273(2) Å, α = 89.114(3), β = 74.763(3), γ = 83.617(3)°, V = 3846.7(9) Å3, Z = 2; for 2a: monoclinic, P21/n, a = 12.586(3) Å, b = 18.397(4) Å, c = 19.526(4) Å, β = 97.367(5)°, V = 4483.8(18) Å3, Z = 2; for 2b: monoclinic, P21/n, a = 12.5122(16), b = 18.374(2), c = 19.531(3) Å, β = 97.156(2)°, V = 4455.2(10) Å3, Z = 2; for 3a: monoclinic, P21/n, a = 12.2578(15), b = 19.037(3), c = 17.952(2) Å, β = 92.371(3)°, V = 4185.5(9) Å3, Z = 2; for 3b: monoclinic, P21/n, a = 12.2312(17), b = 19.007(3), c = 17.960(3) Å, β = 92.318(2)°, V = 4172.0(10) Å3, Z = 2.