{HEAD ~ The formula} of {TAIL ~ the anionic catalyst} is generally defined as M+n n wherein A represents Fe, Ru or Os, M is a cationic species, n is an integer greater than or equal to 2, x is an integer greater than or equal to 1, y is an integer greater than or equal to 0 and z is an integer generally corresponding to the number of available coordination bonding sites in the ruthenium complex 
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{ HEAD ~ The formula } of { TAIL ~ the anionic catalyst } is generally defined as M+n n wherein A represents Fe , Ru or Os , M is a cationic species , n is an integer greater than or equal to 2 , x is an integer greater than or equal to 1 , y is an integer greater than or equal to 0 and z is an integer generally corresponding to the number of available coordination bonding sites in the ruthenium complex
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