2015年7月22日 · I've always known borane ($\\ce{BH3}$), as a reagent for alkene hydroboration. Recently in class we talked about its use in the reduction of carboxylic acids to alcohols as well. Now obviously $\\ce...

2018年8月1日 · BBr3 is more acidic than BCl3 due to weaker pi back bonding in BBr3 as compared to BCl3.BCl3 is stronger acid than BH3 due to electron withdrawing effect of Cl make B becomes more electron deficient despite of pi back bonding in BCl3. Due to steric reason BMe3 is stronger acid than BPh3.

2017年3月19日 · I had to write the complete mechanism for you so that you can understand it better. See the image below. I have explained it in the simplest form. Some of the points I would like to discuss before you look at the mechanism are: In BH3, Boron is less electronegative than H (i.e. hydrogen) , hence in the syn addition I have shown, hydrogen ends up being attached to …

2019年2月14日 · The reduction of secondary amides with BH3 requires 3 equivalents, mechanism shown below image sourced from here. The borane becomes HB=O which may transform further depending on work up.

2016年7月20日 · Are there any other conditions for the second reaction, like heating or acid catalysis? If that were the case then I would suggest an ester as the product, after a reduction to the primary alcohol by borane in the first step.

2014年11月29日 · Why doesn't unstable odd electron compound $\ce {NO}$ dimerize to $\ce {N2O2}$? Why doesn't this structure of ozonide dimerize? But why then does $\ce {BH3}$ dimerizes to $\ce {B2H6}$, and $\ce {AlCl3}$...

2012年5月4日 · Diborane has the interesting property of having two 3-centered bonds that are each held together by only 2 electrons (see the diagram below, from Wikipedia). These are known as "banana bonds." ...

2015年3月28日 · What is the mechanism of the reduction of organic acids with borane? Borane reductions don't work well with electron deficient carbonyl groups. Why is that so, and how isn't the carboxyl group an

2022年1月30日 · Why does BH3/THF reduce the carbonyl group to a methylene rather than an alcohol?

PHX3 P H X 3 has a more bent structure than NHX3 N H X 3. The HOMO-LUMO gap for PHX3 P H X 3 is smaller than for NHX3 N H X 3, and so the distortion from the trigonal planar geometry is said to be larger. However, why is the HOMO-LUMO gap smaller for PHX3 P H X 3? It should be possible, I suppose, to argue for why this is so by using qualitative molecular orbital theory, …