Carbonate Ester - Types

Types

Carbonate esters can be divided into three categories by their structures. The first and general case is the dialkyl or diaryl carbonate that comprises a carbonate group with two R substituents. The simplest members of this class include dimethyl carbonate and diphenyl carbonate:

  • Dimethyl carbonate

  • Diphenyl carbonate

Instead of terminal alkyl or aryl R-groups, two carbonate groups can be linked by an aliphatic or aromatic bifunctional group. For example, poly(propylene carbonate) and poly(bisphenol A carbonate) (Lexan):

  • Poly(propylene carbonate)

  • Poly(bisphenol A carbonate) (Lexan)

Alternatively, the carbonate groups can be linked by a 2- or 3-carbon bridge, such as ethylene carbonate and trimethylene carbonate; substituents, e.g. CH3 for propylene carbonate are possible too:

  • Ethylene carbonate

  • Trimethylene carbonate

  • Propylene carbonate

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