Catalysis Puns

• DOI/PMID/ISBN: 10.1038/s41570-021-00340-y

• URL

Why is base-catalyzed hydrolysis called base catalysed when u don't get back ur initial catalyst in it's original form (OH^(-))?

does the concentration of an acid affect its ability to catalyse a reversible reaction? eg. if you increase/decrease conc. of the already strong HCL acid - does it mean a higher concentration would release H3O at a faster rate or has more released in a fixed time or sm? Or not cos catalysts regenerate.

I am confused between a base as catalyst or a nucleophillic catalyst. What is the difference?

Apparently the unstable complex [Fe(S2O3)2]- is formed at the beginning (violet colour) and turns colourless after time. The iron 3+ reduces to iron 2+ and this process can be catalysed but I don't know what reaction pathways the catalyst provides. Help would be appreciated!

Catalysts used are 2+ transition metal ions e.g. manganese (ii) chloride

Adnan S/OAbdul Qayyum Title Green Solvent for synthesis and catalysis: Room Temperature Ionic Liquids. This proposal describes a research project to synthesis the ionic liquids; the al.

Site-selective peptide functionalization provides a straightforward and cost-effective access to diversify peptides for biological studies. Among many existing non-invasive peptide conjugations methodologies, photoredox catalysis has emerged as one of the powerful approaches for site-specific manipulation on native peptide. Herein, we report a highly N-termini-specific method to rapidly access itaconated peptides and their derivatives through a combination of transamination and photoredox conditions. This strategy exploits the facile reactivity of peptidyl–dihydropyridine in the complex peptide settings, complementing extant approaches of bioconjugations with excellent selectivity under mild conditions. Distinct from conventional methods, this method utilizes the highly reactive carbamoyl radical derived from a peptidyl–dihydropyridine. In addition, this itaconated peptide can be further functionalized as a Michael acceptor to access the corresponding peptide–protein conjugate.

https://ift.tt/3I7SddO

Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c08768

Kun Lu, Yaqi Fan, Ju Huang, Jilong Wang, Hao Xu, Jingang Jiang, Yanhang Ma, and Peng Wu

https://ift.tt/3l1bvYc

US East (Ohio), password: mango

Hi I'm an undergrad chemist who's wondering what are resources for me to learn about the catalysts used in industry. I know they are wildly different from what I work with in academia, but I haven't found much sources that clearly lay out the different factors.

Like I vaguely know stability, cost, scale up efficiency... but how are any of those things actually applied?

Oh and I'm hoping for some info on CO2 reduction, carbon capture, renewable energy, that kind of thing?

Thanks!

I am a beginner in Lewis acid and base. In this photo, the opening of epoxide by a nucleophile e.g. alkyne anion is catalyzed by BF3.

https://preview.redd.it/rm9u6prj7ao71.png?width=1005&format=png&auto=webp&s=c689b800e21a22988ad8a8987b23641d6ec5ba1a

1. According to Wikipedia, BF3-Et2O serves as a source of BF3. What are the factors to select a molecule that coordinates with the Lewis acid BF3? For example, the same Wikipedia page also describes methanol and even propanol can be used (seems the same principle as the lone pair electron on O donates into empty p orbital in B) Can I say any Lewis bases can coordinate with BF3 for this Lewis acid catalysis?
2. And, according to Wikipedia, the mechanism of lewis acid catalysis is:

> Lewis acid catalysis often involves binding of the catalyst to Lewis basic heteroatoms and withdrawing electron density.

• so, just to confirm my understanding: The electronegativity of boron and fluorine differs greatly. When BF3 forms an adduct to the oxygen atom in epoxide, the electron density of oxygen is drawn to the 3 fluorine atoms in BF3, hence increasing the electrophilicity of oxygen atom. Therefore, rate of the attack by the nucleophile (alkyne anion) to open the epoxide is enhanced.

Please explain to me if I have made any mistakes, thanks a lot.