Neopentane melting point

Common Name 2,2-Dimethylpropane Synonym neopentane, tetramethylmethane Chemical Name 2,2-dimethylpropane CAS Registry No 463-82-1 Molecular Formula C5H12 Molecular Weight 72.149 Melting Point (°C) ... 

The mclling point of a compound is another property to which symmetry is an important contributor. Symmetrical molecules lend to have higher melting points than their less symmetrical isomers. For example, the melting point of neopentane is - 17 °C, that of n-pentane - 130 °C. If the molecule has very high symmetry, the melting point may be raised until the substance sublimes rather than melts. If you think about some substance that you know sublimes (in addition to SF6 mentioned above), you will note that it has high symmetry. Common examples are I,. CO, and camphor. The extreme example is perhaps dodecahedrane. C H ... 

The addition of small concentrations of solutes to water depresses the equilibrium melting point (a colligative property) and appears in all cases studied to depress the temperature at which nucleation is observed as well. This is discussed in particular by Oguni and Angell with respect to alcohols and related solutes that form hydrogen bonds with the water. They discuss the possibility, based on extrapolations from other solutes, that T may increase slightly with the addition of neopentane, but the proposal is speculative and has not been tested experimentally. 

The melting point of a compound is another property to which symmetry is an important contributor. Symmetrical molecules tend to have higher melting points than their less symmetrical isomers. For example, the melting point of neopentane is... 

THERMODYNAMIC PROPERTIES OF NEOPENTANE FROM 4 K. TO THE MELTING POINT AND COMPARISON WITH SPECTROSCOPIC DATA. 

There are three forms of pentane the straight-chain normal pentane (a = 2), the branched isopentane (a = 1), and the doubly branched neopentane (a = 12) in the shape of a tetrahedron. Figure 4.37 shows that normal pentane has the highest density and boiling point, which can be attributed to the superior packing efficiency of linear molecules isopentane, in comparison, has lower density and lower melting and boiling points. Neopentane does not follow the usual rules it has the lowest... 

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