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An organic compound with a carbon–halogen bond. Alkyl, allylic and vinylic attachment differ in geometry and substitution reactivity.
A fluorinated carbon material often written CFx. Fluorination disrupts extended graphitic conjugation and introduces carbon–fluorine bonding.
Cerium dioxide is , often called ceria, with a fluorite-related crystal structure. It can accommodate oxygen vacancies together with changes between cerium(IV) and cerium(III).
Titanium dioxide is , occurring in crystal forms including rutile and anatase. Its strong interaction with visible light explains its use as a white pigment.
Its semiconductor behavior also supports photocatalytic processes under suitable illumination. Crystal phase, particle size, surface chemistry, and defects can change that behavior even when the nominal formula remains the same.
Zirconia is zirconium dioxide, . Its monoclinic, tetragonal, and cubic structural forms differ in stability and physical properties.
Dopants can stabilize high-temperature structural forms at lower temperatures and create oxygen vacancies. This underlies applications in structural ceramics and oxide-ion conducting electrolytes, connecting phase stability with defect chemistry.
An eight-membered cyclic conjugated system with eight electrons. A planar bond-alternating model has the D4h molecular point group. Constraints on planarity matter when discussing its molecular geometry and electronic stability.
An compound with approximately tetrahedral phosphorus. Its short, strongly polar P–O bond can be described using ionic contributions and oxygen lone-pair donation into P–R antibonding orbitals, without requiring large phosphorus 3d participation.
A compound with the grouping . A carboxylate-derived leaving group can be expelled during nucleophilic acyl substitution.
Molecular has a trigonal-planar sigma framework and ligand-to-boron pi donation. Association energetics differ from those of aluminium chloride.
The aluminium methyl compound commonly forming with four terminal methyl groups and two electron-deficient methyl bridges. Variable-temperature NMR distinguishes slow and fast site exchange.
An organic nitrogen reservoir formed by association of a peroxyacetyl radical with nitrogen dioxide. Thermal dissociation can release reactive nitrogen again; its temperature sensitivity helps distinguish transport through cool air from rapid recycling in warmer air.
A reservoir linked to nitrogen dioxide and nitrate radical by reversible association. Conversion to nitric acid, especially through heterogeneous uptake on wet particles, can remove reactive nitrogen from the gas-phase family.
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