Why do BH3 and NaBH4 have different selectivities?
2015年7月22日 · Note that this mechanism does in fact include hydride transfers (it has to). Though you were right in thinking that $\ce{BH3}$ wouldn't immediately donate a hydride, …
organic chemistry - Why does BH3/THF reduce the carbonyl group …
2022年1月30日 · This reaction is taken from: Pintér, Á.; Sud, A.; Sureshkumar, D.; Klussmann, M. Autoxidative Carbon-Carbon Bond Formation from Carbon-Hydrogen Bonds.
Why BH3 its classified as a "Molecular Hydride" and AlH3 its a ...
2017年6月29日 · First, I understand that, on $\ce{BH3}$, they eletronegativity difference between $\ce{B}$ and $\ce{H}$ is very small. Which mean that the $\ce{B-H}$ bond is less polarized. …
Order of lewis acidity for BBr3, BCl3, BMe3, BH3, BPh3?
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 …
organic chemistry - What is the balanced equation of BH3/THF …
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 …
acid base - Boron trihalides acidity - Chemistry Stack Exchange
$\begingroup$ hint; most important factor in BX3 is the bonding between X and B which is going to determine the acidic strength , and here we can clearly see that in BF3 there is the partial …
Role of methanol in NaBH4 reduction - Chemistry Stack Exchange
2017年8月1日 · I believe methanol does protonate the alkoxide. The resulting methoxide coordinates to $\ce{BH3}$ forming $\ce{(MeO)BH3-}.$ The electron donating character of the …
Lewis acidity comparison of boron and aluminium trichlorides
2020年1月3日 · Lewis acidity is a function of electron deficiency on the acceptor atom, which in this case is $\\ce{B}$ and $\\ce{Al}$ respectively. Back donation is better as is the case of …
What happens when an alkylborane is treated with acetic acid?
2017年12月7日 · In the hydroboration reactions of alkenes I've seen so far, they were always followed by oxidation with $\ce{H2O2/NaOH}$ (to yield alcohols).
hybridization - What makes banana bonds possible in diborane ...
2012年5月4日 · $\ce{B}$ has an $2s^22p^1$ valence shell, so three covalent bonds gives it an incomplete octet. $\ce{BH3}$ has an empty $2p$ orbital. This orbital overlaps the existing …