2 ORGANICALLY-TEMPLATED VANADIUM ARSENATE PHASES - V4AS6O30H6.2N2C6H14.4H2O AND V4AS6O30H8.2N(CH3)4.5.33H2O

Two organically templated vanadium arsenate phases have been synthesiz ed and characterized by single X-ray diffraction and thermogravimetric analyses. Both are comprised of clusters of vanadium arsenate anions that are held together by hydrogen bonding with the included species. The V4As6O30H6 . 2 N2C6H14 . 4 H2O [VAs-Dab] (M(r) = 1439.76) crystal is monoclinic, space group P2(1)/c (No. 14), with a = 9.247(3) angstro m, b = 13.932(3) angstrom, c = 16.105(8) angstrom, beta = 106.31(4)-de grees, V = 1991.26 angstrom3 and Z = 2. Final residuals of R = 3.71% a nd R(w) = 4.17% were obtained for 3044 observed reflections with I > 3 sigma(I). The crystalline compounds is comprised of clusters H-bonded to the organic and water molecules. The V4As6O30H8 . 2 N(CH3)4 . 5.33 H2O [VAsTMA] (M(r) = 346.43) crystal is orthorhombic, space group Cmca (No. 64), with a = 18.742(5) angstrom, b = 12.208(3) angstrom, c = 17 .689(6) angstrom, V = 4047.24 angstrom3 and Z = 16. Final residuals of R = 3.89% and R(w) = 4.13% were obtained for 1756 observed reflection s with I > 3sigma(I). The crystalline compound contains one dimensiona l channels, surrounded by the H-bonded clusters, containing the water molecules and tetramethyl ammonium cations.