Unit cell sorption cavity

The crystal structure of an ethylene sorption complex of a partially decomposed, fully silver cation exchan zeolite A was determined. One type of unit cell consisted of an arrangement of one six-ring Ag+, in the sodalite unit, with seven other silver cations recessed into the large zeolite cavity, where each forms a lateral c-complex with ethylene. These silver cations are in a near tetrahedral environment [Ag—C and Ag—O 2.54(8) and 2.49(1) A, respectively]. Co-ordination complexes AuCl,L (L = olefin) are monomeric and non-disso-ciated in CHCls solution, in contrast with the mixed valency complexes, Au2-Cl4,L ( = 2 or 3), which exist as L Au+, AuCl4. (Norbomadien) Au2Cl4 (n = 1), unlike the complexes with r = 2 or 3, is also not dissociated. ... 

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