Jump to navigation Jump to search
Ethylene glycol, a simple diol

WikiDoc Resources for Diol


Most recent articles on Diol

Most cited articles on Diol

Review articles on Diol

Articles on Diol in N Eng J Med, Lancet, BMJ


Powerpoint slides on Diol

Images of Diol

Photos of Diol

Podcasts & MP3s on Diol

Videos on Diol

Evidence Based Medicine

Cochrane Collaboration on Diol

Bandolier on Diol

TRIP on Diol

Clinical Trials

Ongoing Trials on Diol at Clinical Trials.gov

Trial results on Diol

Clinical Trials on Diol at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Diol

NICE Guidance on Diol


FDA on Diol

CDC on Diol


Books on Diol


Diol in the news

Be alerted to news on Diol

News trends on Diol


Blogs on Diol


Definitions of Diol

Patient Resources / Community

Patient resources on Diol

Discussion groups on Diol

Patient Handouts on Diol

Directions to Hospitals Treating Diol

Risk calculators and risk factors for Diol

Healthcare Provider Resources

Symptoms of Diol

Causes & Risk Factors for Diol

Diagnostic studies for Diol

Treatment of Diol

Continuing Medical Education (CME)

CME Programs on Diol


Diol en Espanol

Diol en Francais


Diol in the Marketplace

Patents on Diol

Experimental / Informatics

List of terms related to Diol


A diol or glycol is a chemical compound containing two hydroxyl groups (-OH groups). Vicinal diols have hydroxyl groups attached to adjacent atoms. Examples of vicinal diol compounds are ethylene glycol and propylene glycol. Geminal diols have hydroxyl groups bonded to the same atom. In general, organic geminal diols readily dehydrate to form a carbonyl group. For example, carbonic acid ((HO)2C=O) is unstable and has a tendency to convert to carbon dioxide (CO2) and water (H2O). Nevertheless, in rare situations the chemical equilibrium is in favor of the geminal diol. For example, when formaldehyde (H2C=O) is dissolved in water the geminal diol (H2C(OH)2) is favored.

Examples of diols in which the hydroxyl functional groups are more widely separated include 1,4-butanediol and bisphenol A.

Synthesis of diols

Because diols are a common functional group arrangement, numerous methods of preparation have been developed.


See also

  • Alcohols, chemical compounds with one hydroxyl group
  • Triols, chemical compounds with three hydroxyl group
  • Polyols, chemical compounds with multiple hydroxyl groups

de:Diole it:Dioli nl:Diol fi:Dioli sv:Diol