Palladium(II) complexes with keto-stabilized phosphonium, arsonium and pyridinium ylides

Gold(I) and Palladium(II) Complexes Containing the Functionalized Ylides Triarylphosphonium Cyanomethylide or 2-Cyanoethylide (R3P=CHR′, R′=CN, CH2CN)

“…, consistent with a trans configuration [29]. This is also the geometry found in the complex [ PdCl 2 {CH( PBu 3 À1 instead of only one.…”

“…However, while 2b or 2c reacted with [ Au(acetone)L]ClO 4 ( L PPh 3 or P(pmp) 3 2 and the phosphonium salt when refluxed, whereas the reaction (1 : 1 molar ratio) in boiling MeCN gave only the ortho-metallated complex. Similarly, Tol 3 PCHCN and PdCl 2 (2 : 1 molar ratio) in refluxing acetone gave 5 after 2 h ( Scheme 1) while a mixture of 5, the phosphonium salt and the orthometallated compound could be detected by NMR spectroscopy after 20 h. Although some other [ PdX 2 {CH( PR 3 )R'} 2 ] complexes with R' C(O )R'' have been isolated [28] [29], the reaction of PdCl 2 with ylides R 3 PCHCN had never been reinvestigated.…”

Synthesis, spectroscopic and structural characterization of new linear mononuclear silver(I) complexes containing α-keto phosphorus ylides as ambidentate ligands

“…The C(8)-O(1) distance in C1 and the C(2)-O(1) distance in C3 are 1.238(4) and 1.247(8) Å, respectively, similar to C-O bond distances found in C-bond ylides. [30][31][32][33] All complexes are examples of an ylide C-bond to a soft metal centre. 11 For the structure of C1, nitrate oxygen atom is highly disordered and is split into two positions with 50% occupancy (O5A-O5B).…”

Ylide Ligands

“…The first examples of metal-bonded ylides were Pd(II) and Pt(II) complexes. The starting materials were simple complexes as MX 2 L 2 or Q 2 [MCl 4 ] (X = halide; L = SMe 2 , NCMe, NCPh; Q = Na, Li) or even the binary salts MCl 2 [28][29][30][31][32][33][34]. Mono and dinuclear complexes (1) -(3), with one or two bonded ylides to each metal center, and in different geometries, were prepared and characterized as shown in Scheme 4.…”