What I do for these type of problems is, just create and optimized the relevant structures (reactants, intermediate-complexes, transition-states, and products) separately and obtain the relative energy and other parameters. This is the way that most people do that I know of.  However, there might be more other options too.

Mr. Verma,

In the following paper you can find answer to your question (theoretical section): 

Adsorption of uranium composites onto saltrock oxides – experimental and theoretical study, Journal of Environmental Radioactivity, Volume 135, September 2014, Pages 75-83, Bojidarka Ivanova, Michael Spiteller

Thanks Lasantha and Bojidarka..