نتایج جستجو برای: metallocenes
تعداد نتایج: 172 فیلتر نتایج به سال:
Kinetic resolution of racemic planar-chiral metallocenes was performed through the conjugate addition of a nucleophile to the enal part of substrates. While no enantiomeric discrimination was found with low-molecular-weight organocatalysts, a properly designed resin-supported peptide catalyzed the reaction in a highly selective manner.
Metallocenes are well-established compounds in organometallic chemistry, which can exhibit either coplanar or bent structures according to the nature of metal center (M) and cyclopentadienyl ligands (Cp). Herein,...
This work studies synthesis of carbon nanotube (CNT) sheet using the high temperature (1400 °C) floating catalyst chemical vapor deposition (FC-CVD) method. Three metallocenes—ferrocene, nickelocene, cobaltocene—and their combinations are used as precursors for metal catalysts in process. For source, an alcohol fuel, a combination methanol and n-hexane (9:1), is used. First, metallocenes were d...
The introduction metallocenes, in particular ferrocene (Fe(η-C5H5)2), cobaltocene (Co(η-C5H5)2), and nickelocene (Ni(η-C5H5)2), together with the carborane source molecule closo-1,2-dicarbadodecaborane, during plasma enhanced chemical vapor deposition, will result in the transition metal doping of semiconducting boron carbides. Here we report using ferrocene to introduce Fe dopants, and a semic...
We study the rectification of current through a single molecule with an intrinsic spatial asymmetry. The molecule contains a cobaltocene moiety in order to take advantage of its relatively localized and high-energy d states. A rectifier with large voltage range, high current, and low threshold can be realized. The evolution of molecular orbitals under both forward and reverse biases is captured...
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