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Cycloheptane is a colorless liquid with a mild, aromatic odor. The boiling point at normal pressure is 119°C. [3] The molar enthalpy of vaporization is 38.5 kJ mol −1. [4] ...
Cycloheptene is a 7-membered cycloalkene with a flash point of −6.7 °C. It is a raw material in organic chemistry and a monomer in polymer synthesis. Cycloheptene can exist as either the cis - or the trans -isomer.
Cycloalkanes have higher boiling points, melting points, and densities than alkanes. This is due to stronger London forces because the ring shape allows for a larger area of contact. Even-numbered cycloalkanes tend to have higher melting points than odd-numbered cycloalkanes.
Melting point: 14.5 °C (58.1 °F; 287.6 K) [1] Boiling point: 151.2 °C (304.2 °F; 424.3 K) [1] ... Related compounds Related cycloalkanes. Cycloheptane:
Its freezing point is −94 °C and its boiling point is 49 °C. Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more carbon rings. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure. It was first prepared in 1893 by the German chemist Johannes Wislicenus. [5]
Melting point: −80 °C (−112 °F; 193 K) Boiling point: 116 °C (241 °F; 389 K) Solubility in water. Insoluble in water Acidity (pK a) 36 Hazards
The melting points of the alkanes follow a similar trend to boiling points for the same reason as outlined above. That is, (all other things being equal) the larger the molecule the higher the melting point. However, alkanes' melting points follow a more complex pattern, due to variations in the properties of their solid crystals. [a]
Cyclohexane has two crystalline phases. The high-temperature phase I, stable between 186 K and the melting point 280 K, is a plastic crystal, which means the molecules retain some rotational degree of freedom. The low-temperature (below 186 K) phase II is ordered.