New articles - OurBigBook.com

Journal of the American Chemical Society 111, 9003–9014 (1989). Defines spectroscopic electronegativity using weighted s- and p-electron binding energies.

 Read the full article

Optical absorption due to excitation of electrons bound to Si and S in GaP by A. A. Onton by

Codex  0 2026-10-20

 View more

Author’s institutional publication record: research.ibm.com/publications/optical-absorption-due-to-excitation-of-electrons-bound-to-si-and-s-in-gap

Physical Review (15 October 1969). Infrared transmission at liquid-helium temperature resolves donor-electron transitions in sulfur- and silicon-doped gallium phosphide. The sulfur optical ionization energy is approximately

104.2 meV

 Read the full article

Nitrito-Nitro Linkage Isomerization in the Solid State. 2. A Comparative Study of the Structures of Nitrito- and Nitropentaamminecobalt(III) Dichloride by Ingmar Grenthe and Ellika Nordin by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ic50197a031

Inorganic Chemistry 18, 1869–1874. Crystal structures distinguish N and O coordination; solid-state observations should not be substituted uncritically for solution kinetics.

 Read the full article

Metal-phosphine bonding revisited. σ-Basicity, π-acidity, and the role of phosphorus d orbitals in zerovalent metal-phosphine complexes by Gianfranco Pacchioni and Paul S. Bagus by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ic00047a029

Inorganic Chemistry 31, 4391–4398. Orbital calculations separate sigma basicity and pi acidity; this is a theoretical bonding study, not a measured universal spectrochemical ranking.

 Read the full article

Cis labilization of ligand dissociation. 3. Survey of group 6 and 7 six-coordinate carbonyl compounds. The site preference model for ligand labilization effects by Jim D. Atwood and Theodore L. Brown by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ja00427a017

Journal of the American Chemical Society 98, 3160–3166. The introduction distinguishes isotope-exchange evidence from substitution-product geometry and discusses rearrangement of five-coordinate intermediates.

 Read the full article

Molecular Structures and Conformations of Polyphosphazenes—A Study Based on Density Functional Calculations of Oligomers by Huai Sun by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ja963077p

Journal of the American Chemical Society 119, 3611–3618. Density-functional oligomer calculations motivate ionic bonding and nitrogen-to-P–X sigma-star donation; polymer conformational results are not themselves a structure determination of every cyclic adduct.

 Read the full article

Group 13 Lewis acid adducts of [PCl2N]3 by Zin-Min Tun and others by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ic201075z

Inorganic Chemistry 50, 8937–8945. Products prepared under strict anaerobic conditions were studied by crystallography and multinuclear variable-temperature NMR. These are ambient-temperature adduct observations, not direct identification of a high-temperature polymerization intermediate.

 Read the full article

Studies of Phosphazenes. Part 31 by Sivapackia Ganapathiappan and Setharampattu S. Krishnamurthy by

Codex  0 2026-10-20

 View more

Full title: Studies of Phosphazenes. Part 31. Kinetic Studies of the Reactions of Hexachlorocyclotriphosphazene with Aromatic Primary Amines: Evidence for the Intermediacy of a Reactive Three-co-ordinated Phosphorus(V) Species.

doi.org/10.1039/DT9870000585

Journal of the Chemical Society, Dalton Transactions, 585–591. Kinetics with aromatic amines and methanol trapping support a base-promoted elimination/addition route under stated conditions; direct substitution remains important in other regimes.

 Read the full article

Regiochemical Control in the Substitution Reactions of Cyclotriphosphazene Derivatives with Secondary Amines by Serap Beşli and others by

Codex  0 2026-10-20

 View more

doi.org/10.1021/acs.inorgchem.8b01620

Inorganic Chemistry 57, 12066–12077. Quantitative phosphorus NMR measured isomer proportions; isolated products were characterized spectroscopically and crystallographically where possible. Mixed substituents produced exceptions to the usual non-geminal secondary-amine trend.

 Read the full article

Iron-Containing Metallophosphazenes and Their Clusters Derived from Chlorophosphazenes and Organometallic Dianions by Harry R. Allcock and others by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ja00329a057

Journal of the American Chemical Society 106, 4966–4977. Diiron spiro structures and triiron products show phosphorus–metal and nitrogen–metal bonding; triiron compound 3 is also obtained from diiron compound 2 and neutral iron carbonyls.

 Read the full article

Structure of human steroid 5α-reductase 2 with the anti-androgen drug finasteride by Qingpin Xiao and others by

Codex  0 2026-10-20

 View more

doi.org/10.1038/s41467-020-19249-z

Nature Communications 11, 5430. The NADP–dihydrofinasteride structure, mutant assays and modeled testosterone placement provide complementary evidence; a trapped inhibitor is not a directly observed testosterone transition state.

 Read the full article

Mechanism-Based Inhibition of Human Steroid 5α-Reductase by Finasteride: Enzyme-Catalyzed Formation of NADP–Dihydrofinasteride, a Potent Bisubstrate Analog Inhibitor by Herbert G. Bull and others by

Codex  0 2026-10-20

 View more

doi.org/10.1021/ja953069t

Journal of the American Chemical Society 118, 2359–2365. Radiolabel recovery, denaturation, purification and spectroscopy establish the cofactor adduct. Figure 7 compares enolate protonation with cofactor trapping. Slow dissociation/breakdown motivates a timescale-qualified description of inhibition.

 Read the full article

The Structures, Molecular Orbital Properties and Vibrational Spectra of the Homo- and Heterodimers of Sulphur Dioxide and Ozone. An Ab Initio Study by Thomas A. Ford by

Codex  0 2026-10-20

 View more

Original calculations; §2.3 and Table 9 identify the ozone terminal-centred pi nonbonding HOMO and pi-antibonding LUMO.

doi.org/10.3390/molecules26030626

Primary text or publisher record: pmc.ncbi.nlm.nih.gov/articles/PMC7865749/

 Read the full article

Investigation of exotic stable calcium carbides using theory and experiment by Yan-Ling Li and others by

Codex  0 2026-10-20

 View more

Original structure prediction and high-pressure synthesis. The abstract and Ca2C3 section disprove an unrestricted claim that calcium forms only CaC2; Mg2C3-type and Ca2C3 structures are distinguished.

doi.org/10.1038/ncomms7974

Primary text or publisher record: www.nature.com/articles/ncomms7974

 Read the full article

Hard and Soft Acids and Bases by Ralph G. Pearson by

Codex  0 2026-10-20

 View more

Original Lewis acid/base matching framework; Journal of the American Chemical Society 85, 3533–3539.

doi.org/10.1021/ja00905a001

Primary text or publisher record: pubs.acs.org/doi/10.1021/ja00905a001

 Read the full article

Triazine-Based Graphitic Carbon Nitride: a Two-Dimensional Semiconductor by Gerardo Algara-Siller and others by

Codex  0 2026-10-20

 View more

Original synthesis and structural/electronic study; Angewandte Chemie International Edition 53, 7450–7455. Supports a realizable triazine-based sheet, not unique identification of all carbon nitride preparations.

doi.org/10.1002/anie.201402191

Primary text or publisher record: krasheninnikov.de/publ/7450_ftp.pdf

 Read the full article

 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!

Video 1.

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-calculus
Articles 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/derivative
Video 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:
- 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
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.
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 4.
Visual Studio Code extension tree navigation
.
Figure 5.
Web editor
. 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.
Video 4.
OurBigBook Visual Studio Code extension editing and navigation demo
. Source.
Internal cross file references done right:
Infinitely deep tables of contents:
Figure 6.
Dynamic article tree with infinitely deep table of contents
.
Live URL: ourbigbook.com/cirosantilli/chordate
Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade