What is the melting point of naphthalene?
176.5°F (80.26°C)
Naphthalene/Melting point
What happens when naphthalene is heated?
As the naphthalene is heated, heat energy is converted to kinetic energy. Kinetic energy increases and the molecules vibrate faster about their fixed positions and the temperature increases. Naphthalene is in solid state at any temperature below its melting point. The particles can only vibrate at a fixed position.
Does naphthalene have a high or low melting point?
Naphthalene, or napthene, naphthalin, camphor tar, and white tar, is the ingredient found in moth balls. It’s made via crystallization from coal tar. It’s a white solid with a very strong odor. Its melting point is 80.2 degrees C, and its boiling point is 217.9 degrees C.
Does naphthalene undergo Friedel Crafts reaction?
Naphthalene is readily acylated under Friedel–Crafts conditions but generally gives isomeric mixtures of ketone products.
Is naphthalene covalent or ionic?
Naphthalene is a covalent molecule, because it is only consists of carbon-hydrogen bonds, but it is not a complex molecule. Carbon and hydrogen are nonmetals with similar levels of electronegativity.
What is the molecular formula for naphthalene?
C10H8
Naphthalene/Formula
Why naphthalene has low melting point?
In the case of naphthalene and the amine, clearly the naphthalene can stack nicely and so increase its attractive interaction relative to repulsive ones, whereas the amine is twisted and cannot so easily pack meaning that repulsion can be stronger and attractive interactions weaker (even with dipole) and melting points …
How many sigma and pi bonds are in naphthalene?
Naphthalene – 19 sigma and 5pi bonds.
Does naphthalene sublime?
Naphthalene is a solid that sublimes at standard atmospheric temperature with the sublimation point at around 80 °C or 176 °F. At low temperature, its vapour pressure is high enough, 1 mmHg at 53 °C, to make the solid form of naphthalene evaporate into gas.
Which position of naphthalene is more reactive?
Explanation: In the electrophilic substitution, position 1 in naphthalene is more reactive that the position 2 because the carbocation formed by the attack of electrophile at position 1 is more stable than position 2 because of the resonance since it has 4 contributing structures.
Is naphthalene a covalent compound?
How many pi electrons does naphthalene (N) have?
So naphthalene has 10 pi electrons. Think about Huckel’s rule, 4n plus 2. If n is equal to 2, 4 times 2, plus 2 is equal to 10 pi electrons. And so 10 pi electrons is a Huckel number.
How many resonance structures can you draw for naphthalene?
So there are a total of three resonance structures that you can draw for naphthalene. Again, showing the delocalization of those 10 pi electrons. And showing you a little bit about why naphthalene does exhibit some aromatic stability. It’s not quite as aromatic as benzene. All of benzene’s bonds have the exact same length.
PubChem CID 931 Structure Find Similar Structures Chemical Safety Laboratory Chemical Safety Summary (LCSS Molecular Formula C10H8 Synonyms naphthalene 91-20-3 Naphthalin Naphthene
What is the percentage of naphthalene in tar?
At an average content of around 10%, naphthalene represents the most important compound in high-temperature coal tar (coke-oven tar) in terms of quantity. It can already be concentrated to over 90% in primary tar distillation, in the naphthalene fraction boiling between 210 and 220 °C, with a yield in excess of 90%.
https://www.youtube.com/watch?v=2iYFcFfHQzw