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Documenti fondamentali

47675

Sigma-Aldrich

Formaldehyde diethyl acetal

absolute, over molecular sieve (H2O ≤0.01%), ≥99.0% (GC)

Sinonimo/i:

Diethoxymethane, Ethylal

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About This Item

Formula condensata:
CH2(OC2H5)2
Numero CAS:
Peso molecolare:
104.15
Beilstein:
1697253
Numero CE:
Numero MDL:
Codice UNSPSC:
12352100
ID PubChem:
NACRES:
NA.22

Densità del vapore

3.6 (vs air)

Tensione di vapore

60 mmHg ( 25 °C)

Grado

absolute

Saggio

≥99.0% (GC)

Stato

liquid

Temp. autoaccensione

346 °F

Qualità

over molecular sieve (H2O ≤0.01%)

tecniche

GC/GC: suitable

Indice di rifrazione

n20/D 1.373 (lit.)
n20/D 1.374

P. ebollizione

87-88 °C (lit.)

Densità

0.831 g/mL at 25 °C (lit.)

Gruppo funzionale

ether

Stringa SMILE

CCOCOCC

InChI

1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
KLKFAASOGCDTDT-UHFFFAOYSA-N

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Categorie correlate

Descrizione generale

Formaldehyde diethyl acetal (FDEA, diethoxymethane, DEM) is a diethyl acetal. It has been synthesized from ethanol and aqueous formaldehyde. It is a low boiling solvent useful for sodium hydride reactions, organolithium chemistry, copper-catalyzed conjugate additions and phase-transfer reactions. It is a potential alternate for tetrahydrofuran, dichloromethane, glyme and methylal. DEM is an ethoxymethylating agent, a formaldehyde equivalent and a carbonylation substrate. Its condensation with 2-propylresorcinol to form resorcin[n]arenes (n=4–7) has been investigated. The IR and Raman spectra and conformations of DEM have been studied. NMR spectroscopy has been used to study the aggregation behavior of organolithium compounds in diethoxymethane. Unimolecular metastable decomposition of DEM upon electron impact has been studied. Solubility of non-polar gases in DEM has been evaluated.

Applicazioni

Formaldehyde diethyl acetal may be used as a solvent in the esterification of carboxylic acids and in the O-alkylation of a variety of phenols.

Pittogrammi

Flame

Avvertenze

Danger

Indicazioni di pericolo

Classi di pericolo

Flam. Liq. 2

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

23.0 °F - closed cup

Punto d’infiammabilità (°C)

-5 °C - closed cup

Dispositivi di protezione individuale

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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Supelco

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Sigma-Aldrich

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SAFC

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Formaldeide

Metastable decompositions of gem-dialkoxyalkanes upon electron impact. III. Diethoxymethane (CH2 (OCH2CH3)2).
Tajima S, et al.
Rapid Communications in Mass Spectrometry, 14(14), 1195-1199 (2000)
Study on the synthesis of diethoxy methane using toluene-p-sulfonic acid as catalyst.
Gu Z, et al.
Chinese Journal of Applied Chemistry / Ying Yong Hua Xue, 22(12), 1368-1368 (2005)
Solubility of non polar gases in formaldehyde diethyl acetal between-10 and 30?C, and 1 Atm partial pressure of gas.
Lizano LP, et al.
Journal of Solution Chemistry, 19(7), 721-728 (1990)
Use of Diethoxymethane as a Solvent for Phase-Transfer Esterification of Carboxylic Acids.
Coleman MT.
Synthetic Communications, 42(13), 1911-1913 (2012)
NMR spectroscopy of organolithium compounds, Part XVI: The aggregation behavior of butyllithium, phenyllithium, and lithium diisopropylamide in dimethoxy-and diethoxymethane.
Bergander K, et al.
Tetrahedron, 50(20), 5861-5868 (1994)

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