Diethyl Oxalate

An ester, C6H10O4, 146.142 g/mol. Boiling point 185.7 °C @ 760 MM HG, melting point -38.5 °C, as published.

verified recordOrganic — ester8 measured properties

Identifiers

Molecular formula: C₆H₁₀O₄
Molecular weight: 146.142 g/mol
Exact mass: 146.057909 g/mol
IUPAC name: diethyl oxalate
SMILES: CCOC(=O)C(=O)OCC
InChI: InChI=1S/C6H10O4/c1-3-9-5(7)6(8)10-4-2/h3-4H2,1-2H3
InChIKey: WYACBZDAHNBPPB-UHFFFAOYSA-N

Open in ReactionLens Use in reaction prediction

Measured properties

Published measurements, each with its source. Two readings of one property are both shown, in the units each used.

Boiling Point: 185.7 °C @ 760 MM HGmeasured · Hazardous Substances Data Bank (HSDB); 185.4 °C @760 [mm Hg]measured · PAC Chemical Database, U.S. Department of Energy
Melting Point: -38.5 °Cmeasured · Hazardous Substances Data Bank (HSDB); -40.6 °Cmeasured · PAC Chemical Database, U.S. Department of Energy
Density: 1.0785 @ 20 °C/4 °Cmeasured · Hazardous Substances Data Bank (HSDB); 1.079 @ 20°Cmeasured · PAC Chemical Database, U.S. Department of Energy
Solubility: SPARINGLY SOL IN WATER WHICH DECOMP IT GRADUALLY; MISCIBLE WITH USUAL ORG SOLVENTSmeasured · Hazardous Substances Data Bank (HSDB); SOL IN ALL PROPORTIONS IN ALCOHOL, ETHER, ACETONEmeasured · Hazardous Substances Data Bank (HSDB)
Vapor Pressure: 0.41 [mmHg]measured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases; 1 MM HG @ 47 °Cmeasured · Hazardous Substances Data Bank (HSDB)
LogP: 0.56measured · SangsterLogP
Flash Point: 168 °F (NFPA, 2010)measured · CAMEO Chemicals; 168 °F CCmeasured · Hazardous Substances Data Bank (HSDB)
Refractive Index: INDEX OF REFRACTION: 1.4101 @ 20 °C/D; SADTLER REFERENCE NUMBER: 5267 (IR, PRISM); MAX ABSORPTION (ALCOHOL): 225 NM (LOG E= 2.6)measured · Weast, R.C. (ed.). Handbook of Chemistry and Physics. 60th ed. Boca Raton, Florida: CRC Press Inc., 1979., p. C-409

Calculated properties

Derived from the structure, not from a sample; kept apart from the measurements above.

Molecular weight: 146.14 g/molcalculated · reference compound database; Average mass of one molecule, from reference compound database.
Exact mass: 146.0579088 Dacalculated · reference compound database; Mass of the most common isotopic form.
XLogP3: 0.6calculated · reference compound database; Estimated oil/water partition, computed by reference compound database.
Polar surface area: 52.6 Å²calculated · reference compound database; Polar surface area as computed by reference compound database.
Complexity: 114calculated · reference compound database; A rough measure of how intricate the structure is.
H-bond donors: 0calculated · reference compound database
H-bond acceptors: 4calculated · reference compound database
logP: 0.1126calculated · chemistry engine; Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area: 52.6 Å²calculated · chemistry engine; Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors: 0calculated · chemistry engine; Atoms that can donate a hydrogen bond.
H-bond acceptors: 4calculated · chemistry engine; Atoms that can accept a hydrogen bond.
Rotatable bonds: 2calculated · chemistry engine; Single bonds the molecule can freely twist around.
Molar refractivity: 33.266 cm³/molcalculated · chemistry engine; Relates to the molecule's polarisability.
Fraction sp³ carbons: 0.6667calculated · chemistry engine; Share of carbon atoms with tetrahedral bonding.
QED drug-likeness: 0.4096calculated · chemistry engine; Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

C Carbon6 atoms · 49.3% by mass
O Oxygen4 atoms · 43.8% by mass
H Hydrogen10 atoms · 6.9% by mass

Percentages are of the molecular weight above, worked out the same way the molar mass calculator does it.

Structure

Heavy atoms, hydrogen excluded: 10
Total atoms, hydrogen included: 20
Rings: 0
Aromatic rings: 0
Stereocentres: 0
Formal charge: 0

Functional groups

Ester
A carbonyl bonded to an oxygen that links to another carbon.
Ether
An oxygen bridging two carbons.

Matched by structural pattern, not by a measurement.

The molecule in three dimensions

Rotate and inspect the atoms. Loaded only when you ask, so the page stays light.

The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.

Reactions it appears in

No documented reaction with a written procedure and a source involves Diethyl Oxalate yet.

Other names for it

The systematic name on this record is diethyl oxalate.

The sources also call it Ethyl oxalate, Oxalic ether, Ethyl oxalate (VAN), NSC 8851, Diethylester kyseliny stavelove, DTXSID2044472, HSDB 2131, EINECS 202-464-1, UNII-860M3ZWF6J, Diethyl ester of oxalic acid, UN2525.

Structurally related

Nothing structurally close to Diethyl Oxalate has a page here yet.

Seen alongside it in reaction records

Molecules that appear in the same recorded reactions as Diethyl Oxalate. This says nothing about structure: most of them are the bases, solvents, ligands and catalysts the chemistry needed, and they are here because somebody put them in the same flask.

(Bromomethyl)cyclobutane

used as a reactant

C₅H₉Br, 149.031 g/mol.

Where these values came from

reference compound database7268
compound record
chemistry engine
structure perception

compound record.

What this page does not claim

Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.