Duplicate the structure:1. Click a selection tool. The last structure you drew is selected.2. To create a duplicate, hold down the CTRL key while dragging the selection rectangle upward to the right of theoriginal.The selection box disappears while you are dragging.Add a bond between the duplicated structures:1. Click the Solid Bond tool.2. Click and drag from the tertiary carbon atom of the lower fragment to the other tertiary carbon.Note: When connecting existing atoms, the Fixed Length and Fixed Angles commands are ignored.When you release the mouse button, the ethane structure is complete. Now, create its Newman projection.
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