Topics (384k) Articles (398k) Users (410) Discussions (242) Comments (383) Files (13k) New article
Electrostatic catalysis preferentially stabilizes developing charge along the reaction pathway. The comparison must be with the bound reactant: equally stabilizing ground and transition states does not lower their activation free-energy difference.
Proximity and orientation catalysis favors reaction by bringing partners together in a productive geometry. A binding interaction is catalytic only insofar as it improves access to the reactive configuration relative to the starting state.
Hydrogen-bond catalysis preferentially stabilizes a reactive configuration through hydrogen bonds. A hydrogen bond to an intermediate or bound substrate is evidence of an interaction, but its catalytic contribution depends on differential stabilization relative to the starting state.
. It can give a persistent low-temperature tetrahedral addition complex with a grignard reagent, allowing methyl-ketone isolation after aqueous work-up under controlled conditions.
A short-chain fatty acid, including major microbial fermentation products such as acetate, propionate and butyrate. Chain-length conventions vary with context.
The acid CF3COOH. Its electron-withdrawing substituent makes it useful for acid-labile protecting-group removal; anhydrous tert-butyl ester cleavage need not follow water-assisted acyl hydrolysis.
An association of two neutral acid molecules, commonly a cyclic pair joined by two reciprocal hydrogen bonds. Its abundance depends on concentration and competing solvation.
For a series of comparable metal carbonyls, greater metal-to-CO pi backbonding populates CO antibonding orbitals, weakens its internal bond and lowers its infrared stretching frequency. Coupled normal modes and changing geometry must be considered when comparing observed bands.
Transfer of carbon into storage over a specified time horizon. Net sequestration requires uptake to exceed relevant losses under an explicit boundary; high photosynthesis alone does not establish it.
A metal-associated carbene-like reactive centre. Loss of nitrogen from a diazo precursor can generate a centre capable of alkene cyclopropanation; the catalyst and substituents influence its selectivity.
An electrochemical capacitor storing charge through high-area electric double layers, pseudocapacitance, or a combination. Its device energy depends on usable voltage, inactive mass and rate capability as well as electrode capacitance.
Capacitance normalized by a stated mass or volume. Mass-specific differential capacitance is ; electrode and full-device mass conventions must be distinguished.
Differentiating the canonical partition function at fixed external parameters gives and . Consequently the heat capacity isThe identity assumes an energy spectrum independent of temperature and the appropriate fixed-volume canonical ensemble. It relates a thermal response to equilibrium variance.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact