Surface-mediated splitting of water into its components hydration and dehydration reactions

2 Surface-mediated splitting of water into its components (hydration and dehydration reactions) 

The allenyl-substituted ruthenium-platinum derivatives shown in Fig. 9 react with water during chromatography on alumina giving metal-alkyiidene hydrides separate addition of the three fragments forming water to the allenyl ligand apparently occurs. 

Formation of allenylidene derivatives comparable with the above is observed in the reaction of (Cp)2Mo2(CO)4 with lithium isopropenylacetylide protonation of the reaction mixture in an alumina column leads to products with coordinated allenylidene or isopropenyl-alkyne ligands, Fig. This process should be 

Finally, nucleophilic addition of alcohols at the a carbon of allenyls coordinated on binuclear, phosphido-bridged, iron complexes followed by insertion of a carbonyl, leads to coordinated unsaturated esters (Fig. 11). 

Water may also split in two, instead of three, separate fragments an example is the synthesis of the butterfly complexes Ru4(CO)io(C=CHPr )(//3-OR)(PPh2) (R = H, Et) obtained in wet THF or in THF-EtOH.  

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