A Novel Inclusion Compound Consolidated by Host-host and Host-guest Hydrogen Bonding: (2-hydro-xyethyl)trimethylammonium Ions Included in a Channel Host Lattice Built of Urea Molecules and Allophanate Ions

A new inclusion compound, (CH3)3N+(CH2)2OH·NH2CONHCO2 −·(NH2)2CO (1), has been prepared and characterized by X-ray crystallography. Crystal data, MoKα radiation: space group Pna21, Z = 4, a = 8.549(4), b = 12.585(2), c = 12.587(2) Å, and RF = 0.064 for 1160 observed reflections. In the crystal structure 1, a single column of choline ions is accommodated in each channel of the two-component urea-allophanate host lattice, with O-H…O hydrogen bonds formed between the guest hydroxyl groups and host allophanate O atoms. X-ray analysis has shown that ethyl allophanate NH2CONHCOOC2H5 (2) has molecular symmetry m in the crystalline state. Crystal data, MoKα radiation: space group C2m (No. 12), Z = 4, a = 14.455(3), b = 6.920(1), c = 7.097(1) Å, β = 115.80(3)°, and RF = 0.073 for 408 observed reflections.