Trimethyl borate

An organic compound, C3H9BO3, 103.914 g/mol. Boiling point 67.5 °C, melting point -29.3 °C, as published.

verified recordOrganic compound8 measured properties

Identifiers

Molecular formula: C₃H₉BO₃
Molecular weight: 103.914 g/mol
Exact mass: 104.064475 g/mol
IUPAC name: trimethyl borate
SMILES: COB(OC)OC
InChI: InChI=1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3
InChIKey: WRECIMRULFAWHA-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: 67.5 °Cmeasured · Hazardous Substances Data Bank (HSDB); 68 °Cmeasured · ILO-WHO International Chemical Safety Cards (ICSCs)
Melting Point: -29.3 °Cmeasured · Hazardous Substances Data Bank (HSDB); -29 °Cmeasured · ILO-WHO International Chemical Safety Cards (ICSCs)
Density: 0.915 g/cu cmmeasured · Hazardous Substances Data Bank (HSDB); Relative density (water = 1): 0.915measured · ILO-WHO International Chemical Safety Cards (ICSCs)
Solubility: Miscible with tetrahydrofuran, ether, isoporpylamine, hexane, methanol, nujol, and other organic liquidsmeasured · Hazardous Substances Data Bank (HSDB); Miscible with alcohol, ether; soluble in polar nonhydroxylic solventsmeasured · Hazardous Substances Data Bank (HSDB)
Vapor Pressure: 137.0 [mmHg]measured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases; 137 mm Hg at 25 °Cmeasured · Hazardous Substances Data Bank (HSDB)
LogP: -1.9measured · ILO-WHO International Chemical Safety Cards (ICSCs)
Flash Point: less than 80 °F (NFPA, 2010)measured · CAMEO Chemicals; < 80 °F (< 27 °C) (closed cup)measured · Hazardous Substances Data Bank (HSDB)
Refractive Index: Index of refraction: 1.3568 at 20 °C/Dmeasured · Lide, DR (ed.). CRC Handbook of Chemistry and Physics. 81st Edition. CRC Press LLC, Boca Raton: FL 2000, p. 3-87

Calculated properties

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

Molecular weight: 103.92 g/molcalculated · reference compound database; Average mass of one molecule, from reference compound database.
Exact mass: 104.0644743 Dacalculated · reference compound database; Mass of the most common isotopic form.
Polar surface area: 27.7 Å²calculated · reference compound database; Polar surface area as computed by reference compound database.
Complexity: 31calculated · reference compound database; A rough measure of how intricate the structure is.
H-bond donors: 0calculated · reference compound database
H-bond acceptors: 3calculated · reference compound database
logP: -0.0895calculated · chemistry engine; Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area: 27.69 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: 3calculated · chemistry engine; Atoms that can accept a hydrogen bond.
Rotatable bonds: 3calculated · chemistry engine; Single bonds the molecule can freely twist around.
Molar refractivity: 26.781 cm³/molcalculated · chemistry engine; Relates to the molecule's polarisability.
Fraction sp³ carbons: 1calculated · chemistry engine; Share of carbon atoms with tetrahedral bonding.
QED drug-likeness: 0.468calculated · chemistry engine; Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

O Oxygen3 atoms · 46.2% by mass
C Carbon3 atoms · 34.7% by mass
B Boron1 atom · 10.4% by mass
H Hydrogen9 atoms · 8.7% 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: 7
Total atoms, hydrogen included: 16
Rings: 0
Aromatic rings: 0
Stereocentres: 0
Formal charge: 0

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 Trimethyl borate yet.

Other names for it

The systematic name on this record is trimethyl borate.

The sources also call it Trimethoxyborane, Methyl borate, trimethylborate, Trimethoxyboron, Boric acid trimethyl ester, Borester O, Boric acid, trimethyl ester, Trimethoxyborine, Boric acid (H3BO3), trimethyl ester, Trimethylester kyseliny borite, NSC-777.

Structurally related

Nothing structurally close to Trimethyl borate has a page here yet.

Seen alongside it in reaction records

Molecules that appear in the same recorded reactions as Trimethyl borate. 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.

(5-Chloro-2-iodophenyl)methanol

formed as a product

C₇H₆ClIO, 268.481 g/mol.

Where these values came from

reference compound database8470
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.