Herein we report {the first|the very first|the initial} {comprehensive|complete|extensive} series of crystallographically characterised transition metal formyl complexes. In these complexes, the formyl ligand is trapped as {part|component|element|portion|aspect} of a chelating structure {between|in between|among|amongst|involving} a transition metal (Cr, Mn, Fe, Co, Rh, W, and Ir) {and a|along with a|as well as a|plus a|and also a|in addition to a} magnesium (Mg) cation. Calculations {suggest|recommend} that this bonding mode {results|outcomes|final results|benefits} in {significant|substantial|considerable|important} oxycarbene-character {of the|from the|in the|on the|with the|of your} formyl ligand. Electron-rich late-transition metal complexes {have the|possess the} highest oxycarbene-character {to the|towards the|for the} bonding and {are the|would be the|will be the} most {stable|steady} in {solution|answer|remedy|resolution|option}. {Further|Additional} reaction of a heterometallic Cr—Mg formyl {complex|complicated} {results|outcomes|final results|benefits} {in a|inside a|within a} {rare|uncommon} {example|instance} of C–C coupling and formation of an ethenediolate {complex|complicated}. These {results|outcomes|final results|benefits} show that well-defined transition metal formyl complexes are {potential|possible|prospective} intermediates {in the|within the|inside the} homologation of carbon monoxide. 4-Mercaptobenzonitrile web 2,2′-Bipyrimidine web PMID:23800738
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