A large number of xenon compounds have been synthesized and studied by nuclear gamma resonance of the 39.6 keV transition in129Xe. The quadrupole interaction strengths (Q.S.) of all divalent xenon compounds with linear Fndash;Xendash;F groups lie close together, but a small increase of the Q.S. with the acceptor strength of adduct groups is observed. For compounds with Fndash;Xendash;Ondash; and ndash;Ondash;Xendash;Ondash; groups a reduction of the Q.S. of up to 10percnt; is found. The tetravalent compounds exhibit a Q.S. with absolute magnitude very close to that of the divalent compounds, consistent with a square planar configuration and nearly equal contributions to the Q. S. for each Xendash;F bond. Hexavalent xenon in XeF6also exhibits an appreciable Q.S., indicative of distortion of the octahedral fluorine configuration around the xenon atom in the polymeric solid. An increase of the Q.S. relative to XeF6is observed in the adducts and in hexavalent compounds with mixed oxygen/fluorine bonding. This is interpreted as due to increased distortion around the central xenon atom.
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