Crystal structure of the phosphanylidene-σ4-phosphorane DmpPPMe3 (Dmp=2,6-Mes2C6H3) and reactions with electrophiles

The Lightest Element Phosphoranylidene: NHC‐Supported Cyclic Borylidene–Phosphorane with Significant B=P Character

“…[1] Other phosphorus ylides II-IV featuring ad ifferent anionic site, with different properties,and therefore different applications, are also well known. [5] Several stable phosphanylidene-phosphoranes IV [6][7][8] have also been used as phosphinidene transfer agents.B oth the strong s-a nd p-donor character of IV make them excellent ligands for transition metals [9] and for the stabilization of low-valent highly reactive species. [3,4] In contrast, the heavier analogues of I,s ila-ylides III,p resent an enhanced silylenoide character with at ransition-metal-like behavior owing to the weak SiÀPinteraction without any SiÀP p-bond character.…”

“…Particularly,t he nitrogen analogues, phosphazenes II,have attracted significant attention owing to the wide variety of applications as precursors of fireproof polymers [2] and as non-nucleophilic strong bases. [5] Several stable phosphanylidene-phosphoranes IV [6][7][8] have also been used as phosphinidene transfer agents.B oth the strong s-a nd p-donor character of IV make them excellent ligands for transition metals [9] and for the stabilization of low-valent highly reactive species. [5] Several stable phosphanylidene-phosphoranes IV [6][7][8] have also been used as phosphinidene transfer agents.B oth the strong s-a nd p-donor character of IV make them excellent ligands for transition metals [9] and for the stabilization of low-valent highly reactive species.…”

A Masked Phosphinidene Trapped in a Fluxional NCN Pincer

“…X-ray crystal structure of 1 (ellipsoids set at 50 %p robability; H atoms omitted for clarity) [26]. Selectedbondlengths []a nd angles [8]: P1-N2 1.757(2), P1-C8 1.744(3), N2-C171.350(4), C17-C19 1.403(4), C8-C19 1.436(3), N1-C6 1.287(4);C8-P1-N2 87.81(12), C17-N2-P1 116.61(19). P1-N1 contact: 2.676 .…”

Coordination‐Like Chemistry of Phosphinidenes by Phosphanes

“…Average PP single bonds are about 2.22 Å. The structure of DmpP=PMe 3 features an equally short PP bond length of 2.084(2) Å, [31] which is almost as short as that found for diphosphenes. The difference in bond lengths between the multiply bonded and singly bonded phosphorus atoms varies from 0.125 to 0.047 Å.…”