Abstract
The reaction of cis,syn-N-[Ru(bpy)(η2-tpy)(CO)(CHO)]PF6 (1) with p-toluenesulfonic acid in MeOH/CH2Cl2 yields two major products and a minor product, 3, formed by metallacyclization and partial hydrogenation of the pendant pyridine ring of the tpy ligand. The stereochemistry of 3 provides evidence for the accessibility of the linkage isomer of 1 in its chemical reactions; compound 1 and its linkage isomer are possible intermediates in catalytic CO2 reductions leading to C2 products.
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