Mercury(II) complexes of stabilized phosphine–phosphonium ylide derived from bis(diphenylphosphino)methane: Synthesis, spectra and crystal structures

Four-coordinate and pseudo five-coordinate Hg(II) complexes of a new bidentate phosphorus ylide: X-ray crystal structure and spectral characterization

“…C(26)-P(2)-C(1)-P(1) moiety}. The changes in bond lengths and bond angles calculated here are very similar to those observed for the complexes of similar ylides [13,18]. As we explained in previous sections the complex 6 is the product of the crystallization of the compound 4 in DMSO solution.…”

“…However, in this compound due to coordination of DMSO molecule to the metal ion the Hg-C bond length, 2.872 Å, is considerably weakened in comparison with compound 5 (2.446(8) Å) and other complexes (an average of 2.4 Å) [13]. As can be seen in Fig.…”

“…The a-keto stabilized ylides derived from bisphosphines, viz., Ph 2 PCH 2 PPh 2 @C(H)C(O)R, Ph 2 P-(CH 2 ) 2 PPh 2 @C(H)C(O)R (R = Me, Ph or OMe) [6] and PhC(O)C(H)@ PPh 2 CH 2 CH 2 PPh 2 @C(H)C(O)Ph [7] form an important class of hybrid ligands containing both phosphine and ylide functionalities, and can exist in ylidic and enolate forms. These ligands can therefore engage in different kinds of bonding with metal ions [6][7][8][9][10][11][12][13][14][15][16][17].…”

Seven-membered Pd(II) complexes containing symmetric phosphorus ylides: Synthesis, characterization and high catalytic activity toward Suzuki cross-coupling reactions

“…This bond distance suggests an electron delocalization in this molecule [17,42]. The P-C(H) (1.7218(19)) and C(1)-C(2) (1.384 (3)) bond lengths are close to the corresponding distances P-C(H) (1.705(2)) and C-C (1.404(3) Å ) found in similar phosphorus ylides, such as [Ph 2 PCH 2 PPh 2 C(H)C(O)Ph] [43]. The packing structure of 5 has short contacts between the adjacent molecules.…”

Crystal Structure of 4-Bromo benzoylmethylenediphenyldiphenylphosphinomethylphosphorane

“…7,8 Also, in this molecule the bond lengths and angles are generally within normal ranges. 9 A phenyl ring (C28 to C32) showed a disordered structure with an occupancy of 60/40%. The disordered part was refined with restraints of the bond and angles distances.…”