Orgo Freecam

Tool

Highlight color 1–8

Element

Bond order O

Molecule

Loading replaces the scene; SMILES adds next to what's there. Aromatics, charges ([OH-]), radicals ([CH3]), stereo (@, /, \) and "." mixtures work.

Actions

View & options

React — curved arrows

How curved arrows work
Arrows go from electrons to where they end up. Click the source first: a lone pair (or its atom) or a bond. Then click the target: an atom (a new bond forms to it — or, if it's one of the bond's own atoms, the bond breaks onto it) or a bond (it gains a π bond). One arrow per electron pair; Diels–Alder = π→C, π→C, π→σ. Leave out a "making room" arrow and the engine fills it in.
    ⌫ removes the last arrow · Esc cancels a half-drawn one · Y lone pairs · +/− on an atom sets its charge · undo after a reaction returns to the reactants with the arrows still drawn.

    Bond rotation

    —
    Rigid-rotation energy (toy force field). Q/E, the slider, or scroll over the bond to rotate the back atom (the one farther from you). N again brings it to the front.

    Ring conformation

    Chair
    chairhalftwistboattwisthalfchair′
    Release drops the conformer restraint and lets the ring fall into the nearest energy minimum (a boat will slide to a twist-boat or chair).
    Empty scene. Click anywhere to drop a C, or press / to load a molecule.
      ↑↓ choose · Enter run · Esc close

      Shortcuts

      Look & move

      Drag
      orbit around the molecule
      Right-drag
      look around
      Scroll
      zoom toward the cursor
      WASD
      fly · Space up · Shift/C down
      ←→↑↓
      turn the camera (look left/right/up/down)
      hold Tab
      fly / turn fast
      M
      fly mode (mouse-look + crosshair) · Esc leaves it
      F
      frame the molecule

      Tools

      B
      Build — click atom: add · click bond: set order
      L
      Link — atom, then atom: bond / close ring
      X
      Delete (right-click deletes in any tool)
      V
      Select — bond: rotate · ring atom: chair/boat
      T
      React — curved arrows
      ;
      Highlight — color atoms/bonds for teaching (1–8 colors, right-click removes)

      Atoms & bonds

      1–9
      C H N O F Cl Br I B
      O
      cycle bond order · ⇧1–⇧3 pick it (plain 1–3 in Link)
      Alt-click
      change an atom to the current element
      + − *
      on the atom under the cursor: charge up / down, radical
      H
      auto-hydrogens on/off

      Conformers & reactions

      Q E
      rotate the selected bond
      N · P
      Newman view (again: swap front/back) · play a chair flip
      R
      relax (releases a ring restraint)
      Enter · ⌫
      run reaction (on a selected bond: spin it 360°) · remove last arrow
      U
      attack from the other face

      View & general

      K J I
      style · hide H · element labels
      G Y
      axial/equatorial colors · lone pairs
      , .
      undo · redo (hold to scrub; also Z/⇧Z, ⌘Z)
      / or ⌘K
      search everything / type a SMILES
      Esc
      cancel · deselect

      Your molecule, view and settings are saved in this browser.

      Orgo Freecam

      Build organic molecules in 3D, spin bonds, flip chairs and push curved arrows.

      1. Look around. Drag to orbit, scroll to zoom, WASD to fly, arrow keys to turn.
      2. Build. Pick an element on the left, then click an atom to attach it. Right-click deletes, , undoes and . redoes.
      3. Explore. Press / to load a molecule or a guided reaction — e.g. type "SN2" or "chair".

      Hover over anything: the label under the cursor says what a click will do. Press ? anytime for every shortcut.