A Novel Layered Complex with Rhomboidal Channels : Hydrothermal Synthesis, Crystal Structure, and Properties of Cu(4, 4′-bipy)_2(H_2PO_4)_2(H_2O)_2(bipy = bipyridine)

摘要

The combination of both 4, 4′-bipyridine(4, 4′-bipy) and dihydrogen phosphate anion ligands with copper ( Ⅱ ) results in the formation of a novel layered compound Cu (4, 4′-bipy)_2 (H_2PO_4)_2 (H_2O)_2. The crystal structure comprises discrete neutral Cu(4, 4′-bipy)_2(H_2PO_4)_2(H_2O)_2 units. The copper atom, located on the crystallographic twofold axis, is coordinated with two nitrogen atoms of terminal 4, 4′ -bipy ligands and two water molecules at the equatorial positions, and two dihydrogen phosphate oxygen atoms at the axial positions, forming an elongated octahedron. The complex is a two-dimensional distorted rhomboidal network possessing two kinds of rhomboids with dimensions of ca. 1. 6792 nm X 0. 3203 nm and 1. 2778 nm X 0. 3198 nm, respectively. The two-dimensional networks are stacked parallelly on each other along c-axis to give an extended three-dimensional channel network with an interlayer distance of ca. 0. 5030 nm. Crystal data : tri-clinic, space group P_1~-, a = 1. 0253(2) nm, b = 1.4501(3) nm, c = 0. 79715(16) nm, α = 97. 91(3)°, β= 90.99(3)°, γ = 85.54(3)°, V = 1. 1703(4) nm~3, Z = 2, R = 0. 0892, Wr = 0. 2451.