Synthesis and crystal structure of Mg (II) complex with 3-amino-2-pyrazinecarboxylic acid ligand

X. S. Tai, Y. F. Li and W. H.

Abstract

A novel complex, [Mg(L)2(H2O)2]·(H2O) [L= 3-amino-2-pyrazinecarboxylic acid] was synthesized in ethanol/H2O (v:v=3:1) with magnesium chloride hexahydrate and 3-amino-2-pyrazinecarboxylic acid as raw materials. It was characterized by elemental analysis, IR and X-ray single crystal diffraction analysis. The crystal of the title complex [Mg(L)2(H2O)2]·(H2O) belongs to orthorhombic, space group P-1 with a= 2.9288(6) nm, b= 0.82286(16) nm, c= 1.2132(2) nm, α= β= γ= 90º, V= 2.9238(10) nm3, Z=8, Dc= 1.611 μg·m-3, μ= 0.173 mm-1, F(000)= 1472, and final R1= 0.0247, ｗR2= 0.0697. X-ray analysis reveals that the complex comprises a six-coordinated magnesium (II) center, with a N2O4 distorted octahedron coordination environment. The molecules are connected by hydrogen bonds and π-π stacking to form one dimensional chain structure.