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Merck

D27802

1,4-Diazabicyclo[2.2.2]octane

greener alternative

≥99%, crystals, ReagentPlus®

Synonym(s):

TED, Triethylenediamine

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About This Item

Empirical Formula (Hill Notation):
C6H12N2
CAS Number:
280-57-9
Molecular Weight:
112.17
NACRES:
NA.21
PubChem Substance ID:
57654087
UNSPSC Code:
12352100
EC Number:
205-999-9
MDL number:
MFCD00006689
Beilstein/REAXYS Number:
103618
Assay:
≥99%
Form:
crystals

Key Documents

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Product Name

1,4-Diazabicyclo[2.2.2]octane, ReagentPlus®, ≥99%

InChI key

IMNIMPAHZVJRPE-UHFFFAOYSA-N

InChI

1S/C6H12N2/c1-2-8-5-3-7(1)4-6-8/h1-6H2

SMILES string

N12CCN(CC2)CC1

vapor pressure

2.9 mmHg ( 50 °C)

product line

ReagentPlus®

assay

≥99%

form

crystals

greener alternative product characteristics

Catalysis
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refractive index

n20/D 1.4634 (lit.)

Quality Level

200

density

1.02 g/mL at 25 °C (lit.)

greener alternative category

, Aligned

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General description

1,4-Diazabicyclo[2.2.2]octane (DABCO) is a bicyclic compound used as a strong base and catalyst in organic synthesis.

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for catalytic efficiency. Click here for more information.
1,4-Diazabicyclo[2.2.2]octane (DABCO, triethylenediamine), a caged tertiary diamine, is a commonly used strong hindered amine base in chemical synthesis. It can also be employed as a complexing ligand and as a catalyst. Its gas-phase electronic absorption spectrum, vibrational spectra, multiphoton ionization (MPI), and two-photon fluorescence excitation (TPFE) spectra have been recorded and analyzed. Proton magnetic resonance (PMR) studies of DABCO in solid state were conducted in order to determine its line width, second moment, and spin-lattice relaxation time.

Application

1,4-Diazabicyclo[2.2.2]octane (DABCO) may be used in the synthesis of isoxazole derivatives via dehydration of primary nitro compounds in the presence of dipolarophiles. DABCO may be used in the preparation of the following:
  • DABCO bis(perhydrate)
  • DABCO monohydrate
  • DABCO hexahydrate

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

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Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Sol. 1 - Skin Irrit. 2

Storage Class

4.1B - Flammable solid hazardous materials

wgk

WGK 1

flash_point_f

144.0 °F - closed cup

flash_point_c

62.2 °C - closed cup

ppe

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

D27802-100G: + D27802-25KG: + D27802-5KG: + D27802-2KG: + D27802-VAR: + D27802-25G: + D27802-500G: + D27802-BULK:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ3017
0000427511
0000427511
MKCX3219
0000416420

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Structure and Intramolecular Motions in Triethylenediamine as Studied by Gas Electron Diffraction.
Yokozeki A and Kuchitsu K.
Bulletin of the Chemical Society of Japan, 44(1), 72-77 (1971)
Hydrogen bonding in the perhydrate and hydrates of 1,4-diazabicyclo [2.2.2] octane (DABCO).
Laus G, et al.
CrystEngComm, 10(11), 1638-1644 (2008)
Reversible crosslinking and fast stress relaxation in dynamic polymer networks via transalkylation using 1, 4-diazabicyclo [2.2. 2] octane
Maassen EEL, et al.
Open Journal of Polymer Chemistry, 12(25), 3640-3649 (2025)
1,4-Diazabicyclo [2.2.2] octane (DABCO) as an Efficient Reagent for the Synthesis of Isoxazole Derivatives from Primary Nitro Compounds and Dipolarophiles: The Role of the Base.
Cecchi L, et al.
European Journal of Organic Chemistry, 2006(21), 4852-4860 (2006)
Experimental vibrational spectra and computational study of 1,4-diazabicyclo [2.2.2] octane.
Kovalenko VI, et al.
Journal of Molecular Structure, 1028, 134-140 (2012)
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