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7553-56-2 - Iodine, 99+% - A12278 - Alfa Aesar

A12278 Iodine, 99+%

CAS-Nummer
7553-56-2
Synonyme

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Iodine, 99+%

MDL
MFCD00011355
EINECS
231-442-4

Chemische Eigenschaften

Formel
I2
Molmasse
253.81
Schmelzpunkt
183-186° subl.
Flammpunkt
None
Dichte
4.930

Literaturverweise

Efficient catalyst for the formation of 1,1-diacetates from aldehydes and acetic anhydride: J. Org. Chem., 62, 1563 (1997).

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The stereochemistry of the iodolactonization of unsaturated acids to give -lactones can be controlled in some cases. Using I2_-_NaHCO3, the product is under kinetic control, but in acetonitrile, without base, the reaction is reversible and therefore under thermodynamic control. For tabulated results, see: Org. Synth. Coll, 7, 164 (1990):

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Iodolactamisation of amides can similarly be achieved by prior silylation: J. Org. Chem., 53, 4006 (1988); Org. Synth. Coll., 9, 516 (1998):

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Secondary, tertiary or benzylic alcohols can be converted directly to the corresponding iodides by simply refluxing with iodine in petroleum ether: Tetrahedron Lett., 36, 609 (1995).

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Iodine is also a useful mild oxidant, e.g. of aldehydes to acids in alkaline medium: Tetrahedron Lett., 33, 4329 (1992); in DMSO, stilbenes and diaryl acetylenes give benzils: Synthesis, 131 (1991); with hydrogen peroxide, hydroquinones are oxidized to quinones: J. Org. Chem., 54, 718 (1989).

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For use in the functionalization of remote positions (Barton reaction), see Lead(IV)­ acetate, A15551.

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For use in hydroboration and reduction reactions, see Sodium borohydride, 35788.

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GHS Gefahren- und Sicherheitshinweise

Gefahrenhinweise (EU): H400-H312-H332

Very toxic to aquatic life. Harmful in contact with skin. Harmful if inhaled.

Sicherheitshinweise: P261-P273-P280-P271-P304+P340-P312-P363-P322-P302+P352-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Avoid release to the environment. Wear protective gloves/protective clothing/eye protection/face protection. Use only outdoors or in a well-ventilated area. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER or doctor/physician if you feel unwell. Wash contaminated clothing before reuse. Specific measures (see label). IF ON SKIN: Wash with plenty of soap and water. Dispose of contents/container in accordance with local/regional/national/international regulations.

Weitere Referenzen

Merck
14,5014
Beilstein
969212
Gefahrenklasse
8
Verpackungsgruppe
III
Harmonized Tariff Code
2801.20
TSCA
Yes
RTECS
NN1575000

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