Synthesis of aluminum isopropoxide

Preparation of aluminum isopropoxide

Preparation of aluminum isopropoxide

Preparation of aluminum isopropoxide

1 mole or 27 g of aluminum wire or foil are cleaned with emery paper, then with a cloth, and placed in a 1-liter round-bottomed flask containing 300 ml of anhydrous 2-propanol and 0.5 g mercury(II) chloride. The flask is fitted with a reflux condenser protected with a calcium chloride tube. The mixture is then heated to the boiling point on a water-bath. When the mixture starts to boil, 2 ml of carbon tetrachloride are added forming the brown mixture in a few minutes and vigorous evolution of hydrogen soon begins. Heating is then interrupted and the reaction is controlled by cooling in ice-water. When the reaction moderates, heating is continued for the next 6-12 hours until the aluminum is all dissolved. The hot solution is transferred to a distillation flask, the propanol is removed under slightly diminished pressure, and the aluminum isopropoxide is distilled in a vacuum (oil-bath temperature 180-190° C). Aluminum isopropoxide is a colorless viscous liquid, which boils at 130-140°/7 mm, 140-150°/12 mm.
For many purposes it is unnecessary to distil the reagent, and the dark solution obtained on dissolution of the aluminum can be used directly.

A. L. Wilds “Organic Reactions,” Vol. 2, 178, (1944)

The larger amount of aluminum isopropoxide could be prepared by the following procedure: a mixture of 100 g of aluminum wire or turnings, 1200 ml of isopropyl alcohol, and 5 g of mercury(II) chloride is heated to gentle reflux for 10-20 minutes or until the inception of a vigorous exothermic reaction. When the exothermic reaction is complete the mixture is ten reflux for 6-7 hours. Aluminum isopropoxide may be used directly for subsequent reactions, or isolated by distillation at 45-150°/5 mm. The yield is 645-680 g (85-90%).

J. Am. Chem. Soc., 58, 101, 1936

IUPAC Name

aluminum;propan-2-olate

InChI

InChI=1S/3C3H7O.Al/c3*1-3(2)4;/h3*3H,1-2H3;/q3*-1;+3

InChI Key

SMZOGRDCAXLAAR-UHFFFAOYSA-N

Canonical SMILES

CC(C)[O-].CC(C)[O-].CC(C)[O-].[Al+3]

Depositor-Supplied Synonyms

Aluminum isopropoxide, Aluminium isopropoxide, Triisopropoxyaluminum, Aliso, Aluminium triisopropanolate, Aluminum isopropylate, 2-Propanol, aluminum salt, Aluminum triisopropoxide, 555-31-7, Triisopropyloxyaluminum, Aluminum isopropanolate, Aluminum sec-propanolate, Tris(isopropoxy)aluminum, aluminum propan-2-olate, Isopropanol aluminum salt, Aluminum(II) isopropylate, aluminum tripropan-2-olate, Aluminum tris(sec-propoxide), ALUMINUM TRIISOPROPYLATE, Isopropyl alcohol, aluminum salt, HSDB 5429, NSC 7604, EINECS 209-090-8, aluminium(3+) ion tris(propan-2-olate), AI3-14396, 12343-27-0, Aluminum i-propoxide, Triisopropoxyaluminium, triisopropoxy aluminum, aluminum iso-propoxide, triisopropoxyl aluminum, Aluminium isopropanolate, Aluminium triisopropoxide, aluminum tri-isopropoxide, Aluminium sec-propanolate, AC1L1WPD, 2-Propanol aluminium salt, aluminum(III) isopropoxide, aluminium tri-isopropanolate, aluminium tri-iso-propanolate, MolPort-006-109-670, SMZOGRDCAXLAAR-UHFFFAOYSA-N, UNII-R7486191H8, aluminium(3+) tris(propan-2-olate), AKOS015914860, RP26089, RTR-019574, Isopropyl alcohol, aluminum salt (8CI), AN-23680, LS-16488, KB-270768, A0246, R7486191H8, 3B4-3431, I14-7447, 188398-62-1, 245654-30-2, 301192-92-7, 358732-16-8, 365494-41-3, 51796-09-9, 78423-41-3, 856761-21-2, 95797-38-9

Removed Synonyms

2-Propanol aluminum salt, 2-Propanol, aluminum salt (3:1), CID11143, AIP

The preparation of aluminum isopropoxide is presented in following video by ytmachx.

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