Hydrothermal synthesis and crystal structure of allo-bisbridge two-dimensional Ni(II) coordination polymer ∞2[Ni(μ-4,4′-bpy)2/2(μ-L)4/2] (HL=2-indolyl-formic acid)

The allo-bisbridge 2D coordination polymer (2)(infinity)[Ni(mu-4,4'-bpy)(2/2)(kt-L)(4/2)] (HL=2-indolyl-formic acid) has been obtained by using hydrothermal synthesis, and the results of X-ray single crystal diffraction analysis show that the compound crystallizes in monoclinic system, space group C2/c (No. 15) with a=2.300 2 (5) nm, b=1.129 1 (2) nm, c=0.974 0(2)degrees nm, 8=109.85 (3)degrees, V=2.379 2(8) nm(3), D-c=1.494 g (.) cm(-3), Z=4, F(000)=1 104, mu=0.860 mm(-1), R=0.032 2, wR=0.088 8. The crystal structure consists of the [Ni(mu-4,4'-bpy)(2/2)(mu-L)(4/2)] complex molecules, in which the Ni atom is octahedrally coordinated by two N atoms from two different 4,4'-bpy molecule ligands and four O atoms from four different L- anion ligands. TG analysis indicate that title coordination polymer possesses relatively high thermal stability.