Crystal chemistry of protonated 1,2-bis(di-R-aminomethyl)benzenes -: Part III.: 1,2-bis(diethylaminomethyl)benzene perchlorate

The crystals of the 1:1 complex of 1,2-bis(diethylaminomethyl)benzene with HClO4 were studied using X-ray diffraction and FT-IR spectroscopy. The space group is P2(1)2(1)2(1) with a = 8.677(2), b = 14.255(3), c = 15.167(3) Angstrom and Z = 4. The N+-H...N intramolecular hydrogen bond deviates from strict symmetry with N ... N = 2.732(5) Angstrom, N(2)... H(1) = 1.49 Angstrom and N-H ... N = 155 degrees. The IR spectrum of the crystals shows a very broad intense band in the region 2700-1600 cm(-1) and weak continuous absorption at lower wavenumbers, indicating relatively large proton polarizability in the intramolecular hydrogen bond. (C) 1999 Elsevier Science B.V. All rights reserved.