Unordered Mixtures and Ordered Mixtures
Unordered mixtures (also called mixtures) and ordered mixtures (also called formulations) can be expressed by component type groups. A component is a set of atoms contained by a component bracket.
An unordered mixture (denoted by mix at the bottom of the right bracket) consists of several unordered components (denoted by c at the bottom of the right bracket).
For these types of mixtures, the order of addition during the preparation is not important.
![An unordered mixture](images/download/attachments/1802482/ordered_mixture1.PNG)
Ordered mixtures, on the other hand, contain ordered components, which define the order of addition.
![An ordered mixture](images/download/attachments/1802482/ordered_mixture2.PNG)
Draw an Unordered Component
- Draw the structures that form the mixture.
- To define a structure as a component in the mixture, click the Create Group tool, and select the structure.
- In the Create Group dialog window, choose Component (c) from the Type list.
- The Order field must be empty or must contain none . If the Order field already contains a number, just delete it (you can type in none as well).
- Click OK.
Draw an Ordered Component
- Draw the structures that form the mixture.
- To define a structure as a component in the mixture, click the Create Group tool, and select the structure.
- In the Create Group dialog window, choose Component (c) from the Type list.
- If this is the first component of the mixture, click the Order field and enter 1 in the place of none . If the Order field already contains a number MarvinSketch will automatically increment the Order field for subsequent components.
- Click OK.
Draw a Mixture
- Create the components to form the mixture.
- Click the Create Group tool and select the structures.
- In the Create Group dialog window, choose Ordered mixture (f) or Unordered mixture (for) from the Type list.
- Click OK.
Change the Type of a Mixture
- Hover the mouse over the group.
- Right-click and choose Edit Group from the context menu.
- Change the mixture type.
- Click OK.
To add a new component to a mixture draw the new component then drag one part of the bracket and move it to enclose the new component.
To delete a component from a mixture, select the component and press Delete or select the Erase tool.