Reactivity of Pincer Complexes Toward Carbon Monoxide

Reactivity of Pincer Complexes Toward Carbon Monoxide 

Carbonyl pincer complexes that are obtained not from the direct reaction of pincer species with carbon monoxide but from the reaction of pincer ligands with metal-carbonyl as starting materials and those that are obtained from decarbonylative processes of organic substrates are out of the scope of this chapter and have not been discussed. 

---

S I 2 Reactivity of Pincer Complexes Toward Carbon Monoxide... 

Thus, as is the case for the st pincer derivatives with nickel, Moulton and Shaw also reported the first PCP pincer rhodium and iridium derivatives and studied their reactivity toward carbon monoxide [4]. Hence, the (PCP) rhodium derivative (38) affords complex (40), as a product of the decomposition of the unstable hydrido chloro carbonyl intermediate (39) via a hydrodechlorination process, although this compound is obtained impure. To favor the hydrodechlorination process, an alternative route was attempted employing EtONa as base. This approach afforded exclusively compound (40) (Scheme 2.21). It is noteworthy that analogous reactions with the iridium analogous to complex (38) only afford impure samples of the carbonyl species analogous to complex (40). 

---