Wasserlösliche phosphane

Steric and electronic properties in bicyclic phosphines. Crystal and molecular structures of Se=Phoban-Q (Q=C2, C3Ph, Cy and Ph)

“…Both methods were moderately effective, but especially method C yielded some P-P dimeric species as a result of lithium/halogen scrambling. Additional unidentified side products were also observed and may be linked to deprotonation on one or both of the two 2°C atoms of the cyclooctyl group attached directly to P. Even though nucleophilic aromatic substitution is normally an unfavourable process the use of fluorobenzene as electrophile in the preparation of aryl phosphines [33] has been demonstrated. Method D is superior to Method C since the additional preparation of Phoban-Cl can be circumvented.…”

Water Soluble Cationic Phosphine Ligands Containing m-Guanidinium Phenyl Moieties. Syntheses and Applications in Aqueous Heck Type Reactions

“…Its reduction with lithium aluminum hydride gave a mixture of two compounds in a 30:70 ratio. The 31 P{ 1 H} NMR spectrum of the reaction mixture showed in addition to the signal at δP = −38.8 ppm of the desired secondary phosphine 8 a resonance at δP = −17.1 ppm which may be assigned to the diphosphine 9 (cf., δP value for Ph 2 PPPh 2 of −14.1 ppm) . Reductive cleavage of the P−P bond of 9 with excess sodium and subsequent treatment with ethanol gave 8 in a total yield of ca.…”

Tris(pyrazolyl)methanesulfonate (Tpms) − A Versatile Alternative to Tris(pyrazolyl)borate in Rhodium(I) Chemistry

“…General Remarks: The compounds tris(pyrazolyl)methane,21 LiTpms,5 [{Rh(CO) 2 Cl} 2 ],22 [{Rh(nbd)Cl} 2 ],23 [{Rh(cod)Cl} 2 ],24 and P(C 6 H 5 ) 2 ( p ‐C 6 H 4 ‐SO 3 K)·H 2 O25 were synthesized according to literature procedures. All other reagents were commercial samples and were used as received.…”