THE HANDEDNESS CASEBOOK
Stereo Stitch
A rotation changes the view. An inversion changes the molecule.
Repair your model to match the target.
Compare the solid wedges (toward you) and striped wedges (away). Flip only the numbered carbon centers that differ. Turning the drawing helps you compare, but never changes its handedness. Submit when both models describe the same stereoisomer.
Your model
Read a wedge drawing
Unlabelled line ends and corners are carbon atoms. Oxygen O, fluorine F, chlorine Cl and bromine Br are shown explicitly. At a stereocenter, four different groups form a tetrahedron. Exchanging two groups reverses handedness; rotating the whole drawing does not. R/S labels describe the arrangement using chemical priority rules, not simply wedge direction.
The models are educational structural examples. The comparison uses OpenChemLib canonical stereochemical identity, not a visual-image match. One inverted center gives a mirror pair for a one-center molecule; some but not all inverted centers give a diastereomer for these asymmetric examples.