d-Camphersure

Bezeichnung:d-Camphersure

Englisch Name:D-(+)-Camphoric acid

CBNumberCB5296789

SummenformelC10H16O4

Molgewicht200.23

Synonyma

d-Camphersure

d-Camphersure physikalisch-chemischer Eigenschaften

Schmelzpunkt	186-189 °C
alpha	46.5 º (c=10, C2H5OH)
Siedepunkt	297.96°C (rough estimate)
Dichte	1.1860
Brechungsindex	1.4459 (estimate)
storage temp.	Sealed in dry,Room Temperature
Löslichkeit	DMSO (Slightly), Ethanol (Slightly), Methanol (Slightly)
Aggregatzustand	Crystalline Powder
pka	pK1: 4.57;pK2: 5.10 (25°C)
Farbe	White
Optische Aktivität	[α]20/D 46°, c = 1 in ethanol
Wasserlöslichkeit	0.8 g/100 mL
Merck	14,1733
BRN	2050204
CAS Datenbank	124-83-4(CAS DataBase Reference)
NIST chemische Informationen	D-camphoric acid(124-83-4)
EPA chemische Informationen	1,3-Cyclopentanedicarboxylic acid, 1,2,2-trimethyl-, (1R,3S)- (124-83-4)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	22
S-Sätze:	24/25
WGK Germany	2
TSCA	Yes
HS Code	29172090

Gefahreninformationscode (GHS)

R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
white to light yellow crystal powde
Verwenden
D-(+)-Camphoric acid is used primarily as a reagent in syntheses of crystalline structures. It is used in the preparation of polymeric transition metal dipyridylamine D-camphorate complexes.
Verwenden
(1R,3S)-(+)-Camphoric acid may be used in the preparation (1R,2S,3R,5S)-2,3-dibenzyl-1,8,8-trimethyl-3-thianiumbicyclo[3.2.1]octane perchlorate. It reacts with uranyl nitrate in pyridine(py) or py/methanol(MeOH) to form novel uranyl-organic assemblages.
Definition
ChEBI: (?)-Camphoric acid is a dicarboxylic acid.
Allgemeine Beschreibung
Camphoric acid is a diacid, generally prepared by the oxidation of terpene (+)-camphor. It can be used as a chirality inducing agent in some organic reactions.
Lager
+4°C
läuterung methode
Purify the acid by re-precipitation from an alkaline solution by HCl, filter it off, and recrystallise it from water several times, rejecting the first crop. It forms leaflets from EtOH and Me2CO and H2O and is insoluble in CHCl3. Its solubility in H2O is 0.8% at 25o and 10% at 100o, 50% in EtOH and 5% in ethylene glycol. The (±)-acid has m 202-203o. The (+)-1-methyl ester has m 86o (from pet ether) [] 20 +45o (c 4, EtOH), and the (+)-3-methyl ester has m 77o (from pet ether) []17.5 +53.9o (c 3, EtOH). [Rupe & Thommen Helv Chim Acta 30 933