Detail of "625-82-1"

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CAS Number:
625-82-1
Name:
1H-Pyrrole,2,4-dimethyl-
Superlist Name:
2,4-Dimethylpyrrole
Molecular Structure:
Formula:
C₆H₉N
Molecular Weight:
95.14
Synonyms:
Pyrrole,2,4-dimethyl- (6CI,7CI,8CI);2,4-Dimethyl-1-pyrrole;2,4-Dimethyl-1H-pyrrole;NSC 81347;
EINECS:
210-912-2
Density:
0.924 g/cm³
Boiling Point:
171 °C at 760 mmHg
Flash Point:
56.6 °C
Appearance:
clear light yellow to light yellow-orange liquid
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36-37/39 Details

New Hg2+-Selective Chromo- and Fluoroionophore Based upon 8-Hydroxyquinoline: New Hg2+-Selective Chromo- and Fluoroionophore Based upon 8-Hydroxyquinoline. Moon, So Youn; Cha, Na Ri; Kim, Young Hee; Chang, Suk-Kyu ( Department of Chemistry, Chung-Ang University, Seoul 156-756, S. Korea). Journal of Organic Chemistry, 69(1), 181-183 (English) 2004 American Chemical Society. CODEN: JOCEAH. ISSN: 0022-3263. DOCUMENT TYPE: Journal CA Section: 79 (Inorganic Analytical Chemistry) A new 8-hydroxyquinoline deriv. having an appended boron-dipyrromethene function was prepd., and its metal ion sensing properties were studied. The designed compd. exhibited pronounced Hg2+-selective on-off-type fluoroionophoric properties among the representative transition- and heavy-metal ions in aq. dioxane soln. The fluorescence was efficiently quenched >98% with 5 equiv of Hg2+ ions, and the detection limit is 5 ′ 10-6 M in a dioxane-water (1:3, vol./vol.) solvent system. The ionophore also showed a selective chromogenic behavior toward Hg2+ ions by changing the color of the soln. from light amber to red, which can be detected with the naked eye.Except for chemicals metioned above, 625-82-1 and 7439-97-6 are also used. .

Novel pyrromethenes: Novel pyrromethenes. 1-Oxygen and 1-sulfur analogs; evidence for photochemical Z-E isomerization. Van Koeveringe, J. A.; Lugtenburg, J. 625-82-1 and 620-02-0 are also occured in this study. (Lab. Org. Chem., Univ. Leiden, Leiden, Neth.). Recl. Trav. Chim. Pays-Bas, 96(2), 55-8 (English) 1977. CODEN: RTCPA3. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Pyrromethenes [2-(2-pyrrlmethylene)-2H-pyrroles] and 1-O and 1-S analogs. with a min. no. of alkyl substituents can be synthesized under very mild conditions. Even the parent unsubstituted pyrromethene system can be prepd. this way. After synthesis in the dark a Z-configuration was established using NOE measurements. A photochem. Z-E isomerization was detected (PMR spectroscopy) for derivates lacking an intramolecular hydrogen bridge. .