Coordination chemistry of CNH2, the simplest aminocarbyne

Electron-donor/acceptor properties of carbynes, carbenes, vinylidenes, allenylidenes and alkynyls as measured by electrochemical ligand parameters

“…The carbyne, g 2 -vinyl and aminocarbyne complexes trans-[ReCl(L)(dppe) 2 ] + {L = C-CH 2 R (R = alkyl, aryl, CO 2 R) [29], g 2 -C(CH 2 )CH 2 Ph [41], CNH 2 [41]}, derived from protonation of the corresponding vinylidene [29], g 2 -allene [72,73] and isocyanide [57,[74][75][76] compounds trans-[ReCl(L 0 )(dppe) 2 ] (L 0 = C@CHR, CH 2 @C@CHPh, CNH), exhibit considerably higher oxidation potentials than the analogous carbonyl complex and therefore those ligands are expected to behave as more effective p-electron acceptors than CO.…”

“…They are higher than for CO (P L = 0 V) and those ligands can be ordered as above according to their p-acceptance character. Carbynes and the g 2 -vinyl, both formal 3e-donor ligands, are the most effective p-acceptors, being surpassed only by NO + (P L = 1.40 V [14]), also a 3e-donor, whereas the aminocarbyne, with an aminocarbene character, [M]@C@NHR + [75,76], as suggested by X-ray diffraction and IR, behaves as a significantly weaker p-acceptor, although still stronger than carbon monoxide.…”

Bis(cyano) Iron(III) Porphyrinates: What Is the Ground State?

“…This is explained by the bonding property that the isocyanide ligand would display some carbene character when bound to the metal center: Fe–C≡N(R) ↔ Fe=C=N(R). 53 …”

Syntheses of Novel Fe/S Clusters with μ‐Aminocarbyne Ligands

“…In view of scarce syntheses of μ-aminocarbyne complexes and interesting reactivity, our methodology is of important significance. [20][21][22][23][24][25] Scheme 1. Syntheses of complexes 1 and 2.…”