4-Chlorobenzotrichloride — CAS 5216-25-1

4-Chlorobenzotrichloride (C7H4Cl4, CAS 5216-25-1) — a free educational 3D molecular model for teachers and students, by MolGod.org. Every atom carries its engraved element symbol (C, H, O, N...), so no colour key is needed. Ask students to describe the framework of 4-Chlorobenzotrichloride before anything else: one aromatic 6-membered ring. Then count the bonds together; there are 15 (9 single and 6 aromatic, drawn in Kekulé form). Hand the model round and let students tally the engraved atoms:…

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