The crystal structures of four di­meth­oxy­benzaldehyde isomers

The crystal structures of four di­meth­oxy­benzaldehyde (C(9)H(10)O(3)) isomers, namely the 2,3-, 2,4-, 2,5- and 3,5- isomers, are reported and compared to the previously reported crystal structures of 3,4-di­meth­oxy­benzaldehyde and 2,6-di­meth­oxy­benzaldehyde. All di­meth­oxy­benzaldehyde mol­ec...

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Detalles Bibliográficos
Autores principales: Brugman, Sander J. T., Engwerda, Anthonius H. J., Kalkman, Emma, de Ronde, Erik, Tinnemans, Paul, Vlieg, Elias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2019
Materias:
Research Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6323868/
https://www.ncbi.nlm.nih.gov/pubmed/30713730
http://dx.doi.org/10.1107/S2056989018017152
Descripción
Sumario:The crystal structures of four di­meth­oxy­benzaldehyde (C(9)H(10)O(3)) isomers, namely the 2,3-, 2,4-, 2,5- and 3,5- isomers, are reported and compared to the previously reported crystal structures of 3,4-di­meth­oxy­benzaldehyde and 2,6-di­meth­oxy­benzaldehyde. All di­meth­oxy­benzaldehyde mol­ecules in the crystal structures are nearly planar. The largest deviation (1.2 Å) from the aromatic plane is found for one of the meth­oxy groups of 2,3-di­meth­oxy­benzaldehyde. Upon rapid cooling of 3,4-di­meth­oxy­benzaldehyde and 3,5-di­meth­oxy­benzaldehyde, a metastable polymorph is formed. The crystal studied for the 3,5- isomer was refined as a two-component twin.

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