Guest/host relationship in the synthesis of large pore zeolite SSZ-26 from a propellane quaternary ammonium compound

Quaternary ammonium compounds based upon propellane ring systems [n.3.3.0] were prepared for use as guest molecules in molecular sieve synthesis. The objective was to create microporous systems with intersecting pores greater than 7 {angstrom}. Using 8, 11-diquaternaryn ammonium derivatives of the [4.3.3.0.]propellane, a new crystalline phase was obtained, an aluminosilicate, SSZ-26. Two distinct isomeric organic salts were successful. Template I (one of the isomers) crystallized from acetonitrile/H{sub 2}O in the orthorhombic space group P2{sub 1}2{sub 1}2{sub 1} with a = 9.573 (6) {angstrom}, c = 16.912 (9) {angstrom} (at 130 K), and Z = 4. Template III crystallized from H{sub 2}O in the monoclinic space group P2{sub 1}/n with a = 14.681 (4) {angstrom}, b = 12.172 (6) {angstrom}, {beta} = 103.79 (2) {angstrom} (at 130 K), and Z=4. The zeolite product SSZ-26 was characterized by microporosity measurements and catalytic cracking. All data are consistent with a material with pores >7 {angstrom} and a multidimensional channel system. 42 refs., 10 figs., 4 tabs.