Investigation of squaric acid derivates

The aims of the present work are to prove the possibility of employing IR s pectra to investigate the compounds obtained by interaction of Squaric acid (H(2)Sq) and phenyl- or allkyl glycidyl ethers (PhGE or AlkGE), to establi sh the most suitable absorbances for quantitative analyses and to evaluate the formation of H-bonds. Indication of H-bond formation could be taken as the shift of some characteristic absorption bands Deltav for (C-O-C) groups and decreasing of the value Deltah(1/2), where Deltah(1/2) is the peak wid th at half height. The interactions of H(2)Sq and glycidyl ethers were made in the medium of the ethers. (C) 2000 Elsevier Science Ltd. All rights res erved.