2-Methylhexane

Isoheptane

Easily inflammable, volatile liquid

Liquid

0.68 g · cm -3

-118.3 ° C

90 ° C

275 mbar ( 50 ° C)

Practically insoluble in water

1.3848 (20 ° C)

Risk

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2- methylhexane is a chemical compound selected from the group consisting of aliphatic saturated hydrocarbons. It is one of nine constitutional isomers of heptane.

Production and representation

2- Methylhexan is found in petroleum. The compound can also be obtained by the isomerization of n-heptane. As early as 1927, a laboratory synthesis has been described, wherein the Grignard compound of n- butyl bromide is reacted with acetone. The resulting 2 -methyl-2 -hexanol is dehydrated to 2 -methyl-2 -hexene and then hydrogenated using Nickelkatalysor for 2- Methylhexan.

Properties

Physical Properties

2- Methylhexan is a highly flammable, volatile, colorless liquid. The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) with A = 4.00653, B = 1240.869 and C = -53.047 in temperature range 292-364 K. The temperature dependence of the enthalpy of vaporization can be determined according to equation ΔVH0 = A exp ( - βTr ) (1- Tr) β ( ΔVH0 in kJ / mol, Tr = (T / Tc) reduced temperature ) with A = 52 kJ / mol, β = 0.2879 and Tc = 530.3 K describe the temperature range between 298 K and 353 K.

The most important thermodynamic properties are listed in the following table:

Temperature dependence of the heat of evaporation of 2- methylhexane

Safety characteristics

2- Methylhexan forms flammable vapor - air mixtures. The compound has a flash point of -10 ° C. The explosion range is between 1.0 vol % (42 g/m3) as the lower explosive limit ( LEL) and 6.0 % by volume (250 g/m3 ) and upper explosive limit (UEL ). The ignition temperature is 280 ° C. The fabric falls within the temperature class T3.