Related Experiment Video
Updated: Mar 3, 2026
08:12
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
16.6K
Zinc hydridotriphenylborates supported by a neutral macrocyclic polyamine.
Debabrata Mukherjee1, Ann-Kristin Wiegand, Thomas P Spaniol
1Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany. jun.okuda@ac.rwth-aachen.de.
Dalton Transactions (Cambridge, England : 2003)
|May 4, 2017
Summary
New zinc complexes featuring triphenylborates were synthesized. These compounds rapidly insert CO2 into B-H bonds and catalyze the hydroboration of polar substrates like CO2.
Area of Science:
- Organometallic Chemistry
- Boron Chemistry
Background:
- Zinc complexes are versatile catalysts.
- Triphenylborates are useful counterions and reagents.
Purpose of the Study:
- Synthesize novel zinc hydridotriphenylborate complexes.
- Investigate their reactivity with CO2.
- Evaluate their catalytic activity in hydroboration.
Main Methods:
- Synthesis via BPh3-mediated beta-SiH abstraction.
- Salt metathesis reactions with KHBPh3.
- Spectroscopic characterization of synthesized compounds.
Main Results:
- Successful synthesis of [(L)Zn(TMDS)][HBPh3] and [(L)ZnX][HBPh3] complexes.
- Rapid CO2 insertion into the B-H bonds of the complexes.
- Catalytic hydroboration of polar substrates, including CO2, by [(L)Zn(TMDS)][HBPh3].
Conclusions:
- The synthesized zinc hydridotriphenylborates exhibit unique reactivity towards CO2.
- These complexes show potential as catalysts for hydroboration reactions.
More Related Videos
Related Concept Videos
01:19Diazonium Group Substitution: –OH and –H
3.4K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
3.4K
01:25Basicity of Heterocyclic Aromatic Amines
7.1K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
7.1K
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
4.1K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
4.1K
01:20Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
2.6K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
2.6K
01:22Preparation of 1° Amines: Azide Synthesis
4.7K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
4.7K
00:57Cationic Chain-Growth Polymerization: Mechanism
3.0K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
3.0K