Transition Metal-Noble Gas Complexes

Transition Metal-Noble Gas Complexes D. C. Grills and M. W. George... 

O. S. Jina, X. Z. Sun and M. W. George, Do early and late transition metal noble gas complexes react by different mechanisms A room temperature time-resolved infrared study of (z)5-C5H5)Rh(CO)2 (R = H or Me) in supercritical noble gas solution at room temperature. Dalton Trans., 1773-8 (2003). 

Despite the fact that a transition metal-noble gas complex has been isolated only very recently, the study of nohle gas coordination of transition metals actually has a long history. Early experiments used the technique of matrix isolation 18). Under the cryogenic conditions of frozen inert matrices, highly reactive photoproducts become sufficiently long-lived to allow their detection at leisure by conventional spectroscopic techniques such as UV/visible, IR, and EPR spectroscopy. 

Matrix isolation spectroscopy has proved an invaluable technique for the isolation and characterization of transition metal—noble gas complexes (see Table III). However, this technique has obvious limitations. Although photoproducts in low-temperature matrices can be made to react with added dopants, it is impossible to accurately predict their reactivity and mechanisms in solution at room temperature. Therefore, in the years following the original discovery of transition metal-noble gas interactions in matrices, new techniques have been used to probe these species in solution, gas phase, and supercritical fluids. 

Spectroscopic Data Used to Confirm the Formation op Transition Metal-Noble Gas Complexes in Matrix-Isolation Experiments... 

The Bimoleculae Rate Constants for the Reaction of a Series OF Transition Metal-Noble Gas Complexes with CO in Supercritical Noble Gas Solution at 298 K... 

Experimental research into transition metal-noble gas complexes has provided a plethora of spectroscopic information, allowing their characterization and their reactivities to be determined. Table VII collates all of the transition metal-noble gas BDEs that have been determined experimentally by spectroscopic methods. However, these studies give no insight into the nature of the metal-noble gas bonds, e.g., bond lengths, degree of covalency, molecular orbital interactions. Apart... 

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