Gold(I) complexes containing the cationic ylide ligand bis(methyldiphenylphosphonio)methylide

Perfluoroarylgold complexes

“…The phosphoranium salt [CH(PPh 2 Me) 2 ]TfO, synthesized from the ylide [PPh 2 CH PPh 2 Me], reacts with [Au(C 6 F 5 )(tht)] to afford its first metallic complex, [Au(C 6 F 5 ){CH(PPh 2 Me) 2 }]TfO, which, despite the weak nucleophilic character of the ylidic carbon, is stable [143] (Eq. (22)).…”

Coordination Chemistry of Ene‐1,1‐diamines and a Prototype “Carbodicarbene”

“…Although complex 19 engages only one of the two lone pairs of electrons proposed to reside on the central carbon atom of the tetraaminoallene 18 in bonding to the transitionmetal center, it remains to be seen if a dimetalation of this position can also be achieved. [24] To this end, it will be interesting to extend this study to metals other than gold, which was chosen for our preliminary investigation because of its pronounced carbophilicity. Equally promising is the outlook in structural terms, as different types of cumulated ylides are known which might serve as ligands with unusual structural characteristics and donor properties; compound 20 is an obvious candidate amongst the many conceivable choices (Scheme 9).…”

“…[21] The analogy to the more abundant carbodiphosphoranes C and related cumulated ylides is clear. [14,[22][23][24][25] At first glance, one might mistake "carbodicarbenes" for singlet carbenes of the NHC type; note, however, that the latter are formally divalent carbon species, with a pair of electrons in a s orbital as well as an orthogonal but empty p orbital. [12] In striking contrast, the two respective orbitals of a "carbodicarbene" are both filled, containing a pair of electrons each.…”

Carbodiphosphorane: die Chemie von zweibindigem Kohlenstoff(0)

“…Der Ag-C-Abstand in einem verwandten Biscarben-Komplex, der einen NHC-ähnlichen Liganden enthält, liegt bei ca. Der P-C1-Abstand in 5 beträgt 177.0 (7) [20] Diese Verbindungen enthalten ein Monokation, in dem das CDP als Vierelektronen-Donor fungiert. [19] Das C1-Atom in 5 befindet sich in nahezu tetraedrischer Umgebung.…”

“…[19] Das C1-Atom in 5 befindet sich in nahezu tetraedrischer Umgebung. Der P-C1-Abstand in 5 beträgt 177.0 (7) [20] Diese Verbindungen enthalten ein Monokation, in dem das CDP als Vierelektronen-Donor fungiert.…”