4-NITROBENZO-15-CROWN-5 Property

Melting point:

93-97 °C(lit.)

Boiling point:

453.11°C (rough estimate)

Density 

1.191

refractive index 

1.5230 (estimate)

storage temp. 

Store below +30°C.

solubility 

It is soluble in non-polar solvents.

form 

powder to crystal

color 

Light orange to Yellow to Green

BRN 

1598970

CAS DataBase Reference

60835-69-0(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

HazardClass 

IRRITANT

HS Code 

29329985

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

4-NITROBENZO-15-CROWN-5 Chemical Properties,Usage,Production

Chemical Properties

LIGHT YELLOW GRANULAR POWDER

Uses

4-Nitrobenzo-15-crown-5 is a raw material used in synthesis as well as an intemediate in chemical syntheis and pharmaceutica intemediate. It is also used to separate cations, dissolve inorganic salts into organic solvents to perform naked anion chemistry, serve as phase transfer catalysts, and chiral crown ethers have been used to resolve racemic mixtures or separate isomers by chiral chromatography.

Purification Methods

Recrystallise the crown ether from EtOH, MeOH or *C6H6/hexane as for the 18-crown-6 compound below. It complexes with Na+, K+, NH4+, Ca2+, Mg2+ and Cd2+. The 1HNMR spectrum (CDCl3) has (ppm): 3.6-4.4 (m 16CH2), 6.8 (d 1H arom), 7.65 (d 1H arom), 7.80 (dd 1H arom Jab 9Hz and Jbc 3Hz) [Schmid et al. J Am Chem Soc 98 5198 1976, Kikukawa et al. Bull Chem Soc Jpn 50 2207 1977, Toke et al. Justus Liebigs Ann Chem 349 349, 761 1988, Lindner et al. Z Anal Chem 322 157 1985].