Butylbenzenes

Butylbenzenes
Surname	n -butylbenzene	iso- butylbenzene	sec -butylbenzene	tert -butylbenzene
other names	1-phenylbutane	2-methyl-1-phenylpropane	2-phenylbutane	2-methyl-2-phenylpropane
Structural formula
CAS number	104-51-8	538-93-2	135-98-8	98-06-6
PubChem	7705	10870	8680	7366
Molecular formula	C 10 H 14
Molar mass	134.22 g mol −1
Physical state	liquid
Melting point	−88 ° C	−51 ° C	−75 ° C	−58 ° C
boiling point	183 ° C	173 ° C	173 ° C	169 ° C
density	0.86 g cm −3 (20 ° C)	0.85 g cm −3 (20 ° C)	0.86 g cm −3 (20 ° C)	0.87 g cm −3 (20 ° C)
Vapor pressure (20 ° C)	1.3 hPa	1.8 hPa	1.33 hPa (19 ° C)	2.2 hPa
Vapor pressure (30 ° C)			2.33 hPa (25 ° C)	4.08 hPa
Vapor pressure (50 ° C)		15 hPa	15 hPa	12.5 hPa
Vapor pressure (65 ° C)	20 hPa	25 hPa	30 hPa
solubility	14 mg l −1 (25 ° C)	10 mg l −1 (25 ° C)	17.6 mg l −1 (20 ° C)	30 mg l −1 (25 ° C)
	practically insoluble in water, soluble in organic solvents
Flash point	58 ° C	48 ° C	52 ° C	44 ° C
Lower explosion limit (LEL)	0.8 vol%	0.8 vol%	0.8 vol%	0.8 vol%
	44 g m −3	44 g m −3	44 g m −3	44 g m −3
Upper explosion limit (UEL)	5.8% by volume	6.0 vol%	6.9 vol%	5.6 vol%
	330 g m −3	335 g m −3	385 g m −3	310 g m −3
Ignition temperature	420 ° C	425 ° C	415 ° C	445 ° C
Temperature class	T2
GHS labeling	Caution	danger	Caution	danger
H and P phrases	226	304-226	226-302	226-304-332-315
	no EUH phrases	no EUH phrases	no EUH phrases	no EUH phrases
	210	301 + 310-331-210	210	210-301 + 310-302 + 352-331

In chemistry, the butylbenzenes form a group of four aromatic hydrocarbons with all four variants of the butyl group as substituents on the benzene . Their different arrangement results in four constitutional isomers with the empirical formula C ₁₀ H ₁₄ . They also belong to the group of C ₄ benzenes .

presentation

Starting from benzene achieved under catalysis with anhydrous aluminum chloride , the representation of tert -butylbenzene with 2-chloro-2-methylpropane ( tert -butyl chloride) as the electrophile in a Friedel-Crafts alkylation :

Web links

Commons : Butylbenzenes  - Collection of pictures, videos and audio files

Individual evidence

1. ↑ ^{a b c d e f g h i j k l m} Entry on n-butylbenzene in the GESTIS substance database of the IFA , accessed on March 14, 2018(JavaScript required) .
2. ↑ ^{a b} butylbenzene data sheet from Sigma-Aldrich , accessed on November 27, 2012 ( PDF ).
3. ↑ Isobutylbenzene data sheet from Sigma-Aldrich , accessed on November 27, 2012 ( PDF ).
4. ↑ ^{a b c d e f g h i j k l m n} Entry on isobutylbenzene in the GESTIS substance database of the IFA , accessed on March 14, 2018(JavaScript required) .
5. ↑ ^{a b c d e f g h i j k l m n o} Entry on sec-butylbenzene in the GESTIS substance database of the IFA , accessed on March 14, 2018(JavaScript required) .
6. ↑ ^{a b c d e f g h i j k l m n} Entry on tert-butylbenzene in the GESTIS substance database of the IFA , accessed on March 14, 2018(JavaScript required) .
7. ↑ ^{a b} data sheet tert-butylbenzene from Sigma-Aldrich , accessed on November 27, 2012 ( PDF ).
8. ↑ CRC Handbook of Tables for Organic Compound Identification . 3. Edition. 1984, ISBN 0-8493-0303-6 .