Isolation and spectral and structural characterization of bisphenol A cyclic dimer, trimer, and tetramer carbonates

Autor:	Daniel Joseph Brunelle, Mary F. Garbauskas
Rok vydání:	1993
Předmět:	Bisphenol A Polymers and Plastics Stereochemistry Dimer Organic Chemistry Trimer Crystal structure Carbon-13 NMR Oligomer Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Tetramer Diphenyl carbonate Materials Chemistry
Zdroj:	Macromolecules. 26:2724-2729
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma00063a014
Popis:	Cyclic dimer, trimer, and tetramer carbonates of 2,2-bis(4-hydroxyphenyl)propane (BPA) were isolated from a mixture of cyclics obtained by hydrolysis/condensation of BPA bischloroformate. The compounds were characterized by 1 H and 13 C NMR, DSC, and FTIR. Single-crystal X-ray structures were solved for the cyclic dimer and tetramer, as well as for diphenyl carbonate. Analysis of the crystal structures reveals that three distinct conformations about the carbonyl carbon are present, two trans-trans forms, one of which is similar to that found in diphenyl carbonate, and a single cis-trans form, seen only in the cyclic dimer
Databáze:	OpenAIRE
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