Ph3P-BH3 Adduct and Lewis Acids

Chemistry uses models to explain patterns in reactivity, and acid-base definitions have changed over time. Substances have been grouped as acids and bases since ancient Greece. Early descriptions were based on taste. Acids were sour, like lemon juice and vinegar. Bases were used to neutralize acids. The word acid comes from ...

In chemistry, acid-base models are used to explain trends in reactivity and characteristics of reactants, which is important when designing a synthesis.

In 1894, Svante Arrhenius pioneered the concept of acids and bases, describing them specifically as substances that dissociate in water, to yield hydronium or hydroxide ions, respectively....