Crystal structure and thermal behavior of two new organic monosulfates NH3(CH2)5NH3SO4 1.5H2O and NH3(CH2)9NH3SO4 H2O

The chemical preparation, the calorimetric studies and the crystal structure are given for two new organic sulfates NH3(CH2)(5)NH3SO4 1.5H(2)O (DAP-S) and NH3(CH2)(9)(NH3SO4H2O)-H-. (DAN-S). DAP-S is monoclinic P2(1)/n with unit cell dimensions: a = 11.9330(2) angstrom; b=10.9290(2) angstrom; c=17.5260(2) angstrom; beta=101.873(1)degrees; V=2236.77(6) angstrom(3); and Z=8. Its atomic arrangement is described as inorganic layers of SO42- units and water molecules separated by organic chains. DAN-S is monoclinic P2(1)/c with unit cell parameters: a=5.768(2) angstrom; b= 25.890(10) angstrom; c=11.177(5) angstrom; 0=115.70(4)degrees; V=1504.0(11) and Z=4. Its structure exhibits infinite chains, parallel to the [100] direction where the organic cations are interconnected. In both structures a network of strong and weak hydrogen bonds connects the different components in the building of the crystal. (c) 2005 Elsevier Ltd. All rights reserved.