2 UNUSUAL LAYER ALUMINOPHOSPHATES TEMPLATED BY IMIDAZOLIUM IONS - [N2C3H5][ALP2O8H2-CENTER-DOT-2H(2)O] AND 2[N2C3H5][AL3P4O16H]

Two new aluminophosphates [ImH][AlP2O8H2 . 2H(2)O] I and 2[ImH][Al3P4O 16H] 2 have been synthesized solvothermally at 160 degrees C. Both com pounds represent totally new structure types for the already extensive [AlP2O8] and [Al3P4O16] families. Compound 1 has a simple, puckered 2 -D sheet structure containing Al4P4 8-membered rings and octahedral Al centers which are hydrated by trans aqua ligands. It is monoclinic, s pace group 7.188(2),c=6.990(2)Angstrom,beta=103.77(2)degrees, V=1063.5 (5)Angstrom. Single crystal structure analysis gave R= 0.038, R-w=0.04 0 for 943 reflection intensities. Compound 2 has a complex layer struc ture which contains double 6MR subunits, the building blocks of many 3 -D ALPOs, and has 5-coordinate as well as 4-coordinate aluminum. Singl e crystal structure analysis of 2 indicated the triclinic system, spac e group P-l, a = 8.940(2), b = 9.360(2), c = 11.721(2) Angstrom, alpha = 97.10(2)degrees, beta=95.10(2)degrees, gamma=91.91(2)degrees, V=968 .4(3)Angstrom. Refinement gave R=0.044, R-w=0.040 for 1613 unique obse rved reflections. (C) 1998 Academic Press.