4549-31-9 Usage
Description
1,7-Dibromoheptane is an organic compound with the chemical formula C7H14Br2. It is a colorless liquid at room temperature and has a characteristic odor. 1,7-Dibromoheptane consists of a heptane chain with two bromine atoms attached to the first and seventh carbon atoms, respectively. Due to its unique structure, 1,7-Dibromoheptane has found applications in various fields, particularly in the synthesis of liquid crystalline materials.
Uses
Used in Liquid Crystalline Polymers:
1,7-Dibromoheptane is used as a monomer in the synthesis of random thermotropic liquid crystalline copolyether and ternary copolyether. Its presence in these polymers contributes to the formation of liquid crystalline phases, which exhibit unique properties such as anisotropic fluidity and self-assembly.
Used in Liquid Crystalline Dendrimers:
1,7-Dibromoheptane is also used in the synthesis of thermotropic liquid crystalline dendrimers that exhibit a nematic phase. These dendrimers are highly ordered structures with a central core and multiple generations of branches. The incorporation of 1,7-Dibromoheptane in the dendrimer structure enhances the liquid crystalline properties, making them suitable for various applications, such as in the development of advanced materials with unique optical, electronic, and mechanical properties.
Check Digit Verification of cas no
The CAS Registry Mumber 4549-31-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,5,4 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4549-31:
(6*4)+(5*5)+(4*4)+(3*9)+(2*3)+(1*1)=99
99 % 10 = 9
So 4549-31-9 is a valid CAS Registry Number.
InChI:InChI=1/C7H14Br2/c8-6-4-2-1-3-5-7-9/h1-7H2
4549-31-9Relevant articles and documents
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Friedman,P.,Allen,P.
, p. 780 - 784 (1965)
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Preparation of novel ionic liquids and their applications in brominating reaction
Li, Hua,Liu, Juan,Zhu, Jiang,Wang, Hongkai
experimental part, p. 685 - 690 (2011/10/12)
Novel acidic ionic liquids, 1-(ω-sulfonicacid)propyl-3- methylimidazolium bromide ([HSO3pmim]Br)and 1-(ω-sulfonicacid)butyl-3- methylimidazolium bromide ([HSO3bmim]Br), were prepared and used as brominating agents, catalysts and solvents in the synthesis of 1,7-dibromoheptane, respectively. 1,7-dibromoheptan with a yield of 95% was obtained at 100 °C for 2 h by simple phase separation. The acidic ionic liquid [HSO3pmim]Br was recycled for 5 times and the yield of 1,7-dibromoheptane did not decrease remarkably, which indicates that catalysts still maintain good selectivity and activity after recycling. The structure of the acidic ionic liquid [HSO3pmim]Br was characterized with IR, and it was found that [HSO3pmim]Br had stronger acidity than other ionic liquid.
Synthesis and solid-state structures of new cyclophane host molecules
Czech, Bronislaw P.,Kus, Piotr,Stetson, Christopher M.,Dalley, N. Kent,Bartsch, Richard A.
, p. 1360 - 1365 (2007/10/03)
Five new cyclophane host molecules (corrals) are prepared by linking together two α,α′-di(4-hydroxyphenyl)-1,4-diisopropylbenzene or α,α′-di(3,5-dimethyl-4-hydroxyphenyl)-1,4-diisopropylbenzene units with two permethylene spacers. Three small cyclophane hosts (boxes) are synthesized by cyclization of α,α′-di(4-hydroxyphenyl)-1,4-diisopropylbenzene with di(bromomethyl)benzene compounds. Solid-state structures of one corral and one box are reported.