Organolanthnoid complexes （Ln（OAr）3, Ln=Sm, Er, Yb: （MeCp）3Yb; （MeCp）2YbOR, Sm（SPh）3（HMPA）, （MeCp）2SmSPh） were found to serve as efficient catalysts precursors for the Aldol-Tishchenko reaction of butana...Organolanthnoid complexes （Ln（OAr）3, Ln=Sm, Er, Yb: （MeCp）3Yb; （MeCp）2YbOR, Sm（SPh）3（HMPA）, （MeCp）2SmSPh） were found to serve as efficient catalysts precursors for the Aldol-Tishchenko reaction of butanal to give 2-ethyl-1,3-hexanediol monobutyrate in good to high yields under mild conditions. The yields are influenced by the structure of organolanthanoid complexes and the reaction conditions. The yield of trimerization of butanal can reach 85.4% under the certain condition.展开更多
Reaction of homoleptic yttrium tris-alkyl complex YR3 (R=CH2C6H4NMe2-o) with 1 equivalent of amine bis(phenol)s LH2 (L=Me2NCH2CH2N(CH2-(2-O-C6H2-But2-3,5))2) afforded the solvent-free yttrium alkyl complex LYR (1),whi...Reaction of homoleptic yttrium tris-alkyl complex YR3 (R=CH2C6H4NMe2-o) with 1 equivalent of amine bis(phenol)s LH2 (L=Me2NCH2CH2N(CH2-(2-O-C6H2-But2-3,5))2) afforded the solvent-free yttrium alkyl complex LYR (1),which has been characterized with elemental analysis,1H NMR and IR spectra,and structural determination. The coordination geometry around the center metal atom can be best de-scribed as a distorted octahedron. It was found that complex 1 can be used as an efficient catalyst for the Tishchenko reaction.展开更多
The initial step of works on the designing of a mathematical model of a commercial process to manufacture a mixture of butyric acid hydroxyesters, for use in ecological solvent compositions for the paint and varnish i...The initial step of works on the designing of a mathematical model of a commercial process to manufacture a mixture of butyric acid hydroxyesters, for use in ecological solvent compositions for the paint and varnish industry, is presented in the paper. The works referred to in this paper relate the mathematical model of the condensation reactor. A unit process kinetic model was designed based on an analysis of the general differential form of the equation of the reactor mass balance and an analysis of the mechanism of the Tishchenko aldol condensation reaction, as used in the synthesis of butyric acid hydroxyesters, confirmed by the results of GC/MS analysis. The forms of the kinetic equations obtained were verified experimentally by determining the values of the respective reaction rate constants.展开更多
文摘Organolanthnoid complexes （Ln（OAr）3, Ln=Sm, Er, Yb: （MeCp）3Yb; （MeCp）2YbOR, Sm（SPh）3（HMPA）, （MeCp）2SmSPh） were found to serve as efficient catalysts precursors for the Aldol-Tishchenko reaction of butanal to give 2-ethyl-1,3-hexanediol monobutyrate in good to high yields under mild conditions. The yields are influenced by the structure of organolanthanoid complexes and the reaction conditions. The yield of trimerization of butanal can reach 85.4% under the certain condition.
基金the National Natural Science Foundation of China (Grant Nos.20771078 and 20632040)Natural Science Foundation of Jiangsu Province (Grant No. BK2007505)Major Basic Research Project of the Natural Science Foundation of the Jiangsu Higher Education Institutions (Grant No.07KJA15014)
文摘Reaction of homoleptic yttrium tris-alkyl complex YR3 (R=CH2C6H4NMe2-o) with 1 equivalent of amine bis(phenol)s LH2 (L=Me2NCH2CH2N(CH2-(2-O-C6H2-But2-3,5))2) afforded the solvent-free yttrium alkyl complex LYR (1),which has been characterized with elemental analysis,1H NMR and IR spectra,and structural determination. The coordination geometry around the center metal atom can be best de-scribed as a distorted octahedron. It was found that complex 1 can be used as an efficient catalyst for the Tishchenko reaction.
文摘The initial step of works on the designing of a mathematical model of a commercial process to manufacture a mixture of butyric acid hydroxyesters, for use in ecological solvent compositions for the paint and varnish industry, is presented in the paper. The works referred to in this paper relate the mathematical model of the condensation reactor. A unit process kinetic model was designed based on an analysis of the general differential form of the equation of the reactor mass balance and an analysis of the mechanism of the Tishchenko aldol condensation reaction, as used in the synthesis of butyric acid hydroxyesters, confirmed by the results of GC/MS analysis. The forms of the kinetic equations obtained were verified experimentally by determining the values of the respective reaction rate constants.
