Virtual Textbook of Organic Chemistry - Livro-Texto Virtual de Química Orgânica

É isso aí, como o próprio nome diz, é um livro de Química Orgânica virtual.
  organic 

 E é muito completo, cobrindo os seguintes tópicos (deixei em inglês mesmo para vocês clicarem direto no link que interessa):

Structure & Bonding

Electron Configurations of Atoms

Chemical Bonding & Valence

Charge Distribution in Molecules

Practice Problems

The Shape of Molecules

Isomers

Analysis of Molecular Formulas

ResonanceAtomic and Molecular Orbitals

Practice Problems

Intermolecular Forces

Boiling & Melting Points

Hydrogen Bonding

Crystalline Solids

Water Solubility

Practice Problems

Chemical Reactivity

Reaction Classification

By Structural Change

By Reaction Type

Acid-Base Reactions

Oxidations & Reductions

By Functional Group

Reaction Variables

Reactants & Reagents

Product Selectivity

Other Variables

Reaction Rate

Intermediates

Reaction Energetics

Bond Energy

Electronic Effects

Steric Effects

Solvent Effects

Reaction Mechanisms

Curved Arrow Notation

Reactive Intermediates

Reaction Illustrations

Nucleophilicity & Basicity

Acid-Base Catalysis

Practice Problems

Na sequência do post tem mais... Aromaticity Nomenclature Stereoisomers Part I Stereoisomers Part II Summary of Isomerism

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