Crystal and Molecular Structure and Ion Selective and Complexing Properties of 1,5-Bis[2-(Dioxyphosphoryl-4-Methoxy)Phenoxy]-3-Oxapentane Dihydrate [(OH)2(O)P(C6H3OCH3)(OCH2CH2)2O(C6H4OCH3)P(O)(OH)2] • 2H2O

Ion selective and complexing properties of 1,5-bis[2-(dioxyphosphoryl-4-methoxy)phenoxy]-3-oxapentane dihydrate H4M2 center dot 2H(2)O (I) were described. X-ray diffraction analysis for compound I was performed. The crystals are orthorhombic, a = 7.9818(16) angstrom, b = 30.553(6) angstrom, c = 9.0559(17) angstrom, V = 2208.5(8) angstrom(3), Z = 4, space group Pnma, R = 0.0500 over 1372 reflections with I > 2 sigma(I). In I, the H4M2 molecules are combined by hydrogen bonds (HB) with two crystallographically independent H2O(7) and H2O(8) molecules to give neutral H4M2 center dot 2H(2)O aggregates. The HB between the phosphoryl and hydroxyl oxygen atoms of the aggregates and the donor O(7)-H center dot center dot center dot O(8) HB give rise to a layered structure. Conclusions about the Cu(H2M2) compound structure were drawn based on the X-ray diffraction, DTA, and vibrational spectroscopy data.