What’s on the Benzene poster
A definition and 6 facts worth remembering.
Benzene is a planar six-carbon ring with six delocalised pi electrons above and below the plane, giving it extra stability compared with the hypothetical alternating-bond structure.
- All six C-C bonds are identical, intermediate between single and double.
- Hydrogenation is ~152 kJ/mol less exothermic than predicted — the delocalisation energy.
- It undergoes electrophilic substitution, not addition.
- Nitration: conc. HNO₃ and H₂SO₄, 50°C.
- Friedel-Crafts: alkylation and acylation with AlCl₃.
- Halogenation needs a halogen carrier.
- Delocalisation energy — ~152 kJ/mol
- Reaction type — substitution
- Bromine water is decolourised by an alkene and not by benzene — that is the practical…
Substituting preserves the delocalised ring; adding would destroy it and lose the stabilisation. That is the whole reason.
Questions about the Benzene poster
- What’s on the Benzene poster?
- A definition and 6 facts worth remembering. Benzene is a planar six-carbon ring with six delocalised pi electrons above and below the plane, giving it extra stability compared with the hypothetical alternating-bond structure. All six C-C bonds are identical, intermediate between single and double.; Hydrogenation is ~152 kJ/mol less exothermic than predicted — the delocalisation energy.; It undergoes electrophilic substitution, not addition.; Nitration: conc. HNO₃ and H₂SO₄, 50°C.; Friedel-Crafts: alkylation and acylation with AlCl₃.; Halogenation needs a halogen carrier.; Delocalisation energy — ~152 kJ/mol; Reaction type — substitution; Bromine water is decolourised by an alkene and not by benzene — that is the practical…. Substituting preserves the delocalised ring; adding would destroy it and lose the stabilisation. That is the whole reason.
- Who is the Benzene poster for?
- Benzene belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning organic can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Benzene poster?
- Delocalised pi electrons make the ring unusually stable. It substitutes rather than adds. A wall chart earns its place by being glanceable from where the work is happening, so Benzene belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Benzene?
- Alcohols, Alkanes and Alkenes sit alongside Benzene in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AlcoholsAlkanesAlkenes
- Is the Benzene poster free to download and print?
- Yes. Benzene downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Benzene poster print at?
- Benzene is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Benzene loses nothing.Printing guide
Related posters
Charts that sit alongside Benzene on the same wall.
Browse every Chemistry poster, or start from the full catalogue.