Hydrogen-bonded Supramolecular Rosette Ribbon Constructed from Melamine with Isophthalic Acid

摘要

cqvip:The new complex of melamine (MA) with isophthalic acid (H2IA), [(HMA+)- (HIA-)]·2H2O, has been prepared and its structure was characterized by X-ray crystallography. The crystal is of triclinic, space group P1 with a = 7.0228(6), b = 9.1706(8), c = 12.170(1) , α = 95.337(2), β = 105.247(2), γ = 97.813(2)o, V = 742.3(1) 3, Mr = 328.30, Z = 2, Dc = 1.469 g/cm3, λ = 0.71073 , μ(MoKα) = 0.121 mm-1 and F(000) = 344. The structure was refined to R = 0.0389 and wR = 0.1093 for 2513 observed reflections with I > 2σ(I). Melamine dimer and isophthalic acid anion are interlinked by N-H···N and N-H···O hydrogen bonds, resulting in a 1D rosette ribbon in which water molecules and amino groups are self-assembled into quasihexagonal patterns.