Hydrothermal syntheses, characterizations of novel three-dimensional indium phosphite and indium phosphite-phosphate with intersecting 8-membered ring channels: [In3(H2PO3)3(HPO3)4]•(trans-C6N2H16) and [In6(HPO3)8(H2PO3)5(H2PO4)]•(C3N2H12)2

Two new three-dimensional indium phosphite and indium phosphite-phosphate [In-3(H2PO3)(3)(HPO3)(4)]center dot(trans-C6N2H16) 1 and [In-5(HPO3)(8)(H2PO3)(5)(H2PO4)]center dot(C3N2H12)(2) 2 have been synthesized under hydrothermal conditions using 1,2-diaminocyclohexane (1,2-DACH) and 1,3-diaminopropane (1,3-DAP) as structure directing agents, respectively and further characterized by powder X-ray diffraction, single crystal X-ray diffraction, IR spectroscopy, TGA, ICP-AES and elemental analyses. These two compounds have the similar 3D inorganic framework structures with intersecting 8-membered ring (8-MR) channels. In compound 1, the diprotonated trans-1,2-DACH cations occupy the 8-MR channels along the [0 0 1] direction even though a mix of trans- and cis-isomers of 1,2-DACH molecules are added in the reaction mixture. Moreover, the chirality of trans-1,2-DACH alternates along the channels. It is noted that compound 2 is the first indium phosphite-phosphate compound. Crystal data: compound 1, monoclinic, C2/c (No. 15), a = 18.675(4) angstrom, b = 10.220(2) angstrom, c = 13.419(3) angstrom, beta = 98.29(3)degrees, V = 2534.4(9) angstrom(3), and Z=4. Compound 2, orthorhombic, Pna2(1) (No. 33), a = 26.7974(9)angstrom, b = 9.8459(3)angstrom, c = 18.5441(6)angstrom, V = 4892.8(3) angstrom(3), and Z = 4. (C) 2010 Elsevier Inc. All rights reserved.