Introduction

The Resonance Plugin generates all resonance structures of a molecule. The major contributors of the resonance structures can be calculated separately.

As an example see the two structures below: the major resonance contributors of diazomethane, while the structure below them is its canonical form.

Fig. 1 Calculated resonance structures of diazomethane

Fig. 2 Canonical resonance structure of diazomethane

Options

The following options can be adjusted in the Resonance Options panel:

• Max. number of structure: maximize the number of structures to display (decrease calculation time).

• Take canonical form: displays the canonical structure of the molecule.

• Take major contributors: selects the most relevant structures.

• Single fragment mode : if checked (default), the results are displayed in separate windows; otherwise the calculation handles unlinked molecules together and the results appear in the same window.

Fig. 3 Resonance Options window