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The crystal structures of two coordination polymers [Ln(IN)3(H2O)2]n (Ln = Nd 1, Gd 2; IN = isonicotinate) were determined by single-crystal X-ray diffraction and further chara- cterized by IR, elemental analysis and thermogravimetric analysis. Crystal data for 1: monoclinic, space group P21/c, a = 9.6636(5), b = 19.7532(10), c = 11.6183(6) ?, β = 112.032(1)°, V = 2055.83(18) ?3, Z = 4, Dc = 1.766 g/cm3, F(000) = 1076, μ = 2.575 mm–1 and R = 0.0493; Crystal data for 2: monoclinic, space group C2/c, a = 20.251(2), b = 11.6199(11), c = 9.8240(9) ?, β = 115.505(3)°, V = 2086.4(3) ?3, Z = 4, Dc = 1.781 g/cm3, F(000) = 1092, μ = 3.228 mm–1 and R = 0.0695. In the title compounds, the center atoms Ln(III) are in a distorted square antiprismatic geometry and linked by bridging isonicotinate to form an infinite chain. The intermolecular hydro- gen bonds lead to the formation of three-dimensional supramolecular structures.
The crystal structures of two coordination polymers [Ln (IN) 3 (H2O) 2] n (Ln = Nd1, Gd2; IN = isonicotinate) were determined by single-crystal X-ray diffraction and further chara- cterized by IR, elemental analysis and thermogravimetric analysis. Crystal data for 1: monoclinic, space group P21 / c, a = 9.6636 (5), b = 19.7532 (10), c = 11.6183 = 2055.83 (18)? 3, Z = 4, Dc = 1.766 g / cm3, F (000) = 1076, μ = 2.575 mm-1 and R = 0.0493; Crystal data for 2: monoclinic, space group C2 / a = 20.251 (2), b = 11.6199 (11), c = 9.8240 (9)?,? = 115.505 (3) °, V = 2086.4 (3)? 3, Z = 4, Dc = 1.781 g / cm3, F (000) = 1092, μ = 3.228 mm-1 and R = 0.0695. In the title compounds, the center atoms Ln (III) are in a distorted square antiprismatic geometry and linked by bridging isonicotinate to form an infinite chain. The intermolecular hydro-gen bonds lead to the formation of three-dimensional supramolecular structures.