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Pentamethyldiethlenetramine (PMDETA) is a polyazaalkane.
Pentamethyldiethlenetramine (PMDETA) is functionally related to a diethylenetriamine.
Used as ligand in NMR study of complexation/aggregation with neopentyllithium1 and in the study of ligand effects on the selectivity of CO2 incorporation into α,ω-diynes
CAS: 3030-47-5
MF: C9H23N3
MW: 173.3
EINECS: 221-201-1
Synonyms
PMDETA;PMDTA;PENTAMETHYLDIETHYLENETRIAMINE;N,N,N',N',N''-PENTAMETHYLDIETHYLENETRIAMINE;1,1,4,7,7-pentamethyl-diethylenetriamin;2,5,8-trimethyl-2,5,8-triazanonane;2-Ethanediamine,N-[2-(dimethylamino)ethyl]-N,N’,N’-trimethyl-1;n-[2-(dimethylamino)ethyl]-n,n',n'-trimethyl-1,2-ethanediamine
Pentamethyldiethlenetramine (PMDETA) is an organic compound with the formula [(CH3)2NCH2CH2]2NCH3.
Pentamethyldiethlenetramine (PMDETA) is a basic, bulky, and flexible, tridentate ligand that is a used in organolithium chemistry.
Pentamethyldiethlenetramine (PMDETA) is a colorless liquid, although impure samples appear yellowish.
Unlike diethylenetriamine, all three amines in Pentamethyldiethlenetramine (PMDETA) are tertiary.
Both Pentamethyldiethlenetramine (PMDETA) and diethylenetriamine are tridentate ligands that form two five-membered chelate rings.
The σ-donating properties of the amino groups of diethylenetriamine are greater than that of Pentamethyldiethlenetramine (PMDETA) in copper(II) complexes.
Both ligands can coordinate metal complexes in arrangements where the three nitrogen centers are co-planar or mutually cis.
AminCat Pentamethyldiethlenetramine (PMDETA) catalyst (Pentamethyldiethylenetriamine) is a highly active, pure liquid tertiary amine which has C9H23N3 as chemical formula.
Pentamethyldiethlenetramine (PMDETA) is suitable for use as a blowing catalyst in a number of applications.
Pentamethyldiethlenetramine (PMDETA) is also known as PMDETA, PMDTA, PMDT and N-[2-(dimethylamino)ethyl]-N,N’,N’-trimethylethane-1,2-diamine.
Pentamethyldiethlenetramine (PMDETA) Chemical Properties
Melting point: −20 °C(lit.)
Boiling point: 198 °C(lit.)
Density: 0.83 g/mL at 25 °C(lit.)
Vapor pressure: 0.23 mm Hg ( 20 °C)
Refractive index: n20/D 1.442(lit.)
Fp: 128 °F
Storage temp.: Store below +30°C.
Form: Powder
pka: 8.84±0.38(Predicted)
Color: White
Odor: Fishy, ammoniacal odor
PH: 11.9 (100g/l, H2O, 20℃)
Explosive limit: 1.1-5.7%(V)
Water Solubility: Miscible in water.
FreezingPoint: <-70℃
Sensitive: Air Sensitive
BRN: 1741396
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.
InChIKey: UKODFQOELJFMII-UHFFFAOYSA-N
LogP: -2.1 at 25℃
CAS DataBase Reference: 3030-47-5(CAS DataBase Reference)
EPA Substance Registry System: Pentamethyldiethlenetramine (PMDETA) (3030-47-5)
Uses
AminCat Pentamethyldiethlenetramine (PMDETA) catalyst is very effective in pour-in place polyurethane systems (such as rigid appliance systems), which are based on MDI.
At a use level of 1.5 php, AminCat Pentamethyldiethlenetramine (PMDETA) catalyst provides the necessary flow ability and cure rates required in the production environment.
AminCat Pentamethyldiethlenetramine (PMDETA) catalyst is also recommended for TDI, TDI/MDI and MDI HR flexible molded foams, as well as for use in integral skin and microcellular systems.
Pentamethyldiethlenetramine (PMDETA) can also be as a raw material to make quaternary ammonium salt.
Synthesis
Pentamethyldiethlenetramine (PMDETA) is prepared from diethylenetriamine by the Eschweiler-Clarke reaction, involving the use of formaldehyde and formic acid.
(H2N[CH2]2)2NH + 5 CH2O + 5 HCO2H → (Me2N[CH2]2)2NMe + 5 CO2 + 5 H2O
