R-Xhv = radical initiator3º>2º>1º>methyl>aryl, vinylBr2 more selective (only 3º) than Cl2, and slower allylic R-H + NBS, heat, peroxide R-Br benzylic C-OR or C-OH bond + H2, Pd/C becomes benzylic C-H (+ROH/H2O) benzylic C-X bond is the weakest ...
第一章 卤化反应习题及答案 1. 根据以下指定原料、试剂和反应条件，写出其合成反应的主要产物。(1)(CH 3)2NCH 2CH 2OH SOCl 2 (2)CuCl 2 4 (3)P, Br 2 o (4)CH 2CHCOOCH 3干燥 HBr 2 (5)CH 3CH 2CH 2CH 2CH 2COOH SOCl 2 4o (6)S CH 3 22 66 (7)H 3C CH 3 NBS, H 2SO 4...
Rearrangement Reaction(介绍常见的重排反应)
All these indicate that the electronic effect is not uniform with the size of metal NPs, and the strong coupling between electronic and geometric effects makes this matter unresolved till now. For instance, selective hydrogenation of halonitrobenzenes (HNBs) to haloanilines (HANs), a vital ...
Introduction Classic chemical activation strategies are often associated with highly energy-demanding processes, as well as with the use of solvents that often times are not friendly with the environment and are commonly associated with costly and time-consuming procedures for the p...
www.nature.com/scientificreports OPEN Computational studies on the gas phase reaction of methylenimine (CH2NH) with water molecules Mohamad Akbar Ali In this work, we used quantum chemical methods and chemical kinetic models to answer the question of whether or not formaldehyde (...
2. The rearrangement step occurs with retention of the stereochemistry at the migrating center; 3. The oxidation can also be performed asymmetrically 4. on racemic or prochiral ketones using enzymes or chiral transition metal catalysts. Page 7 ...
第一章 卤化反应习题及答案 1. 根据以下指定原料、试剂和反应条件，写出其合成反应的主要产物。(1)(CH 3)2NCH 2CH 2OH SOCl 2 (2)CuCl 2 4 (3)P, Br 2 o (4)CH 2CHCOOCH 3干燥 HBr 2 (5)CH 3CH 2CH 2CH 2CH 2COOH SOCl 2 4o (6)S CH 3 22 66 (7)H 3C CH 3 NBS, H 2SO 4...
High electron conductivity, good distribution of NbS2 and large interlayer spacing with available pores contribute to an overpotential of 118 mV at 10 mA/cm2 in 1 M KOH, while the overpotential of pristine Nb4C2Tx was 324 mV. This study reported the potential of using other types of MXene...
The red and blue lines indicate the strength development of the mortar with or without elevated temperature curing, respectively. Regardless of the curing conditions, the SF addition was highly effective in enhancing the strength (circular mark) of the mortar. In this case, the strength development...