Fig. 4
From: Selective reduction and homologation of carbon monoxide by organometallic iron complexes
Proposed pathway for the conversion of the iron(II) diaryls 1Mes, 1Xyl and 1Naph to 2–4. Proposed mechanism for the reaction between 1Mes, 1Xyl, and 1Naph and CO forming squaraines 2Mes and 2Xyl, carboxylate complexes 3Mes and 3Xyl and carbene complex 4. In the case of Ar = naphthyl, D = complex 4
