Theoretical DFT study of ethylene hydroformylation on platinum complexes with hydrophosphoryl ligands

Synthesis and Characterization of Some Novel Phosphorylated 4‐Oxo‐2‐phenylquinazolines

“…Compounds 7 and 8 may have tautomeric equilibrium between pentavalent and trivalent phosphorus ( A and B forms). The spectral data supported the forms B as major tautomers (Scheme ).…”

Synthesis and antimicrobial activities of some novel bis-pyrazole derivatives containing a hydrophosphoryl unit

“…Also, the signals of NH and H−P=O protons were displaced, presumably as a result of rapid protons exchange in two types of tautomeric equilibriums. The first type is tautomeric amide-imide equilibrium (i, ii, iii), while in the second type, hydrophosphoryl unit in solutions easily undergoes the tautomeric transition, providing it a unique combination of properties of pentavalent (λ 5 , σ 4 form) and trivalent (λ 3 , σ 3 form) phosphorus atom (phosphonate-phosphite i and iv) (Scheme 2) [24][25][26][27]. Also, the 13 C NMR spectrum of compound 3a displayed the carbon atoms of methyl and C=N groups at  14.7 and 157.2 ppm, respectively.…”

“…Abdel-Aziz et al / European Journal of Chemistry 2 (1) (2011)[25][26][27][28][29][30][31][32][33][34][35] …”

Computational aspects of hydroformylation

“…The catalytic cycle of ethylene hydroformylation by organoplatinum hydride complexes with hydrophosphoryl ligands was investigated by Ustynyuk and co-workers employing the PBE functional. 184 The strong hydrogen bond between the two ligand in cis position enables the formation of a quasi-bidentate ligand whose rigidity may enhance the linear regioselectity.…”