Molecular Design Sketch — The Stolley Group

Drawing Board

3D view

Analyze

Whole drawing

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Draw a structure to see its formula

Implicit hydrogens are added from standard valences. Select atoms to analyze part of a drawing, or to open just those atoms in 3D.

Selection

Nothing selected

With the select tool, double-click a structure to select all of it, then drag the round handle to rotate (15° steps; hold Shift for free rotation).

Options

Heteroatom labels

Image format

Label size

Bond width

Image scale

Shortcuts

Click for an instant bond, chain or ring. Press and hold, then move the mouse to swing it to any angle before you let go.
Hover an atom and press C H N O F S P I, L for Cl, B for Br, or + − for charge.
Hover a bond and press 1 2 3 to set its order.
The formatting bar appears while you type a note or atom label (colour, B, I, U, subscript, superscript for the selected characters) and when notes or labelled atoms are selected (colour, bold, italic, underline for the whole selection).
With the Text tool, click an atom (or hover any atom and press Enter) to relabel it: an element such as Sb, an abbreviation such as OTBDMS, Ph or Boc, or a condensed group such as CH2OH or CO2Me. Groups count toward the formula and flip (TBDMSO) when bonded from the right.
Del deletes what's under the cursor or selected. Esc clears the selection.
Otherwise, tool keys are shown on each tool. Hold Shift while dragging to turn off angle snapping.
[ ] rotate the selection 15°.
Press and hold (or right-click) the single bond, double bond or arrow tool for more styles: dashed, bold and wavy bonds; half-dashed and half-bold double bonds; half-head, double-headed, equilibrium, curved and fishhook arrows in three thicknesses. Select an arrow to drag its ends (length and direction) and, for curved arrows, the diamond (curve).
Brackets K and shapes G: drag out a box, or click a structure to put brackets or a shape around it. Hold the tool for square brackets, parentheses or braces; box, rounded box or circle; solid or dashed; three thicknesses. Select one to drag its handles: for brackets the side handles set the distance and the top and bottom set the size (hold Alt to move both sides together); Shift keeps a shape square or round.
Ctrl+Shift+K or Clean up evens out bond lengths and angles (the selected structure, or everything).
Rotate 3D turns the drawing into a 3D line drawing: drag to rotate, Shift+drag to move, scroll to zoom, Esc to return.
Ctrl+Z undo · Ctrl+Y redo · Ctrl+A select all