Introduction to ROCO

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ROCO is a collection of essays that I have written over the years to fill in some gaps (and even correct an occasional mistake) in whatever textbook we are currently using. Textbooks do not emphasize molecular modeling, structure, and energy, as much as I would like, so most of the essays deal with these issues.

Happy reading,
Alan Shusterman, August 2005


Reed students

ROCO is a collection of essays. It is not methodical. It is not comprehensive. Don't try to read it "cover to cover." Just read whatever is useful and interesting. I have tried to make the titles as informative as possible, and I have included reading suggestions in the unit materials.

If you can, read ROCO on-line. I have tried to make this easier by keeping essays, pages, and paragraphs, as short as possible. I have even formatted ROCO pages so that they are narrow (more like a newspaper column) and can be tracked more easily by your eye. I have not provided a "print" version of ROCO.


The rest of the world

ROCO is free, open, without passwords or logins. Please read as much as you can stand. If you see something you like (or something that needs to be fixed or added), let me know (email me). And, if you really like it, recommend it to someone else.



ROCO is offered as "open source" material. In my mind, this means teachers, students, authors, lecturers, whoever, can use ROCO without limits, and can count on my encouragement, as long as these activities do not restrict usage by any other ROCO user, especially me :-). If you have questions about this policy email me.

A word of warning: ROCO constantly changes. Each year I rewrite, cut, add, and insert, to suit my tastes and needs. If you see something you like, copy it now because it may not be part of ROCO in the future.


Table of Contents

Acid-Base Reactions - predict ionization state, most acidic H, most basic atom, substituent effects

Arrows - guide to "chemistry" arrows: reaction arrows, curved arrows

Bond orbitals

Electron density - isodensity surfaces, molecular size (size surface)

Electrostatic potential (2002) - potential maps, atomic charge, intermolecular forces

Hybrid orbitals

Lewis structures - bonding theory, drawing tips & practice problems

Molecular Geometry (2002) - bond distances, van der Waals distances, angles

Resonance (2004 incomplete) - hybrids, contributors, superposition rules, resonance effects (energy, geometry)

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