The kinetics of the hydroformylation of high-molecular-weight cis-1,4-polybutadiene in the presence of HRh(CO)(PPh3)3 and monochlorobenzene as a solvent were studied. The degree of conversion was examined by spectroscopic characterization with Fourier transform infrared and 1H-NMR analysis. ...
The Ag(I) complexes were synthesized by reacting AgNO3 with either 13,5-triaza-7-phosphaadamantane (PTA) or triphenylphosphine (PPh3), in addition to LOMe and L2OMe, in a methanol solution. Ag(I) complexes uniformly exhibited a significant in vitro anti-tumor potency, exceeding that of ...
(i) Sodium dodecylbenzenesulfonate, N2H4·H2O, 100 °C, 8 h; (ii) 4-bromobenzenediazonium tetrafluoroborate, 0 °C to RT, 2 h; (iii) Ar, [Pd(PPh3)4], CuI, Et3N, DMF, 80 °C, 3 days (M1 = 1,3,5-triethynylbenzene; M2 = 2,5-dibromothiophene, 2,5-dibromo-1,3-thiazole,...
Crystal supramolecularity: sixfold phenyl embraces between PPh3 ligands, forming extended nets in one-, two-, and three-dimensions The sixfold phenyl embrace (6PE) is manifest in the crystal structures of approximately 30% of the 5089 molecules with PPh3 ligands (in the Cambridge Struc... I ...
The long-term stability of the Rh/P[CH2CH2(CF2)5CF3]3 catalyst is better than that of the Rh/PPh3 catalyst. Thus, the Rh/P[CH2CH2(CF2)5CF3]3 catalyst is the first catalyst system which can be used for the hydroformylation of both low and high molecular weight olefins and provides ...
Pd(PPh3)4 T olue ne O T ab l el M o lecu lar w eig hts of P D T ST P D determ ine d b y G P C “ “Number- average molecular weight (A ),the degree of polym— erization calculated from Mn ( DP),weight—average molecular weight (Mw) and polydispersity (PD...
2: Conformational isomerism of TPB and its regioirregular cyclization with 1,lO - dibromodecane under high-dilution conditions. Weight Part as SiO2 Column Separation Acetone and Hexanes mixture Each Cyclic Oligorner Figure 2 outlines the synthesis of macrocyclic and linear polyethers based on TPB ...
PTB7-1 obtained from Pd2(dba)2 catalyst showed lower molecular weight of Mn = 41k than that of PTB7-3 obtained from Pd(PPh3)4 catalyst (Mn = 109k). The commercial polymers PTB7-2 and PTB7-4 showed relatively high molecular weight of Mn = 83k and very high molecular weight of Mn =...
The invention discloses a preparation method of polyvinylpyrrolidone with low molecular weight distribution. The method uses azobisisobutyronitrile (AIBN) or benzoyl peroxide (BPO) as an initiator, FeCl or CuCl as a catalyst, and triphenyl phosphine (PPh3) as an organic ligand, to obtain the poly...
(cPBDs) with number-average molecular weight ( Mn ) from 98,000 to 200,000 and carboxylic acid (COOH) contents of 0.5–10 mol % were successfully synthesized through hydrocarboxylation of polybutadienes (PBDs) at temperatures of 140–150°C using PdCl2(PPh3)2 and SnCl2 · 2H2O catalysts...