查询词典 phosphines

Treatment of phosphines with [Ir2Cl] resulted the formation of the products with the phosphine ligand trans to the carbene moiety via substitution of CO.

当膦化物与上述的 [I2Cl]反应时，膦化物会取代反式位置上的CO取代基而形成[Ir(PR3)Cl]。

Fumarates ; Phosphines ; Aluminum compounds ; Food preservatives ; Cereals

延胡索酸盐类；磷化氢类；铝化合物；食品防腐剂；谷物

Analyses of spectroscopic and crystal structural data of iridium complexesIr(PR3)Cl and the Vaska's complex reveal that NHC ligands and phosphines have a similar donating ability toward Ir metal center.

并且从光谱分析及晶体结构数据发现[Ir(PR3)Cl]的错合物与Vaska's 错合物相当类似。因此，我们推论其含氮杂环碳烯与膦化物在ㄧ价铱金属上有相似的配位能力。

The homogeneous catalysts for selective O-methylation of phenols with DMC are generally organic bases, such as tertiary amines or phosphines, tetrabutylammonium halide and Schiff bases.

酚与DMC甲基化反应的均相催化剂一般选择叔胺、叔膦、季铵盐及Schiff碱等有机碱，多相催化剂为碱金属碳酸盐、沸石、氧化铝及附载有金属盐的氧化铝和煅烧的Mg-Al水滑石。

An intramolecular α-addition of hydroxy or amine-substituted electron-deficient alkyns catalyzed by phosphines was developed. An intramolecular β-addition of hydroxysubstituted 2-alkynoates trigged by the tributylphosphine was also achieved.

在上面的研究中发现低活性的亚甲基取代的环内酰胺的[3+2]环加成反应也能顺利进行，因此我们研究并实现了β-位取代的贫电子烯烃的环加成反应，进一步拓展了叔膦催化的[3+2]环加成反应。

The coordinated COD of 3 and 4 can be replaced by carbon monoxide to yield the corresponding dicarbonyl species [(C,N-pyN^C-R) M2]BF4 (14, M= Rh; 15, M= Ir). Ligand substitution of 11a by phosphines and azide causes the de-complexation of pyridinyl-nitrogen donor to generate the corresponding carbene rhodium complexes [(C-pyN^C-Mes)RhPR3] (17a, R = Ph, 17b, R = Et) and [RhN3] (19), respectively, indicating the labile nature of steric-hindered pyridinyl-nitrogen donor.

螯合错合物的吡啶配位，可以容易被σ-予体，如卤离子、叠氮阴离子、膦试剂，置换；但是铑与铱金属螫合物与π-酸试剂，如一氧化碳、异腈，则发生COD被置的产物14a与16；与三甲基亚磷酸酯反应时，COD及吡啶均会被取代而得到单芽的三铑-碳烯错合物18；双膦化合物则会取代铑金属上全部的配位基。

The phosphines such as 〓, dppm bis(diphenylphosphinemethane, dppebis(diphenylphineethane and dppp bis(diphenylphosphinrpropaneare chosen for study. The chloro alkane, bromide alkane and acetone arechosen as solvents.

选择有机单膦〓和双膦配体dppm二(二苯基膦甲烷、dppe二(二苯基膦乙烷、dppp二(二苯基膦乙烷与〓反应，选择氯代烷、溴代烷和丙酮为反应溶剂。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。