Crystal structure and FT-IR study of aqualithium 1-naphthylmethyl ester of monensin A perchlorate

The crystal [MON8-LiClO4-H2O] containing the neutral molecule of 1-naphthylmethyl ester of monensin A (MON8), lithium perchlorate and one water molecule was obtained and its structure was examined using X-ray diffraction and discussed in detail. The MON8-LiClO4-H2O supramolecular complex is crystallized in the non-centrosymmetric space group of the orthorhombic system (P2(1)2(1)2(1)) with four molecules in the unit cell. Within MON8-LiClO4-H2O complex the Li+ cation is square-pyramidally coordinated by four oxygen atoms of the MONS molecule and by the oxygen atom of the water molecule. The oxygen atoms (O9 and O14) of the two OH groups are involved in two intramolecular O(14) H ... O(9)(9) and O(9) H ... O(14) hydrogen bonds of similar strength stabilizing a pseudo-cyclic structure of MON8. Additionally the coordinated water molecule acts as proton donor in the two hydrogen bonds. The FT-IR spectrum of the crystal provides spectroscopic evidence for the complex formation and it is discussed in detail. (C) 2010 Elsevier B.V. All rights reserved.