Crystal structure landscapes from combined vibrational spectroscopy and ab initio calculations: 4-(Dimethylamino)benzaldehyde

resumo

In this work, the usefulness of the Pairs in Molecular Materials (PiMM) approach to elucidate unknown structures of molecular crystals is assessed. This methodology aims to assist the prediction of probable crystal structures from the vibrational spectra, through the identification of the most relevant motifs in the potential energy landscape of the crystal. The method is successfully applied to the elucidation of 4-(dimethylamino)benzaldehyde crystal structure, considered to be "unknown" to illustrate the applicability of the PiMM approach. The proposed crystal structure, based on weak CH center dot center dot center dot O hydrogen bonding and pi-stacking interactions, is in full agreement with the recently reported crystal structure. (C) 2010 Elsevier B.V. All rights reserved.

palavras-chave

O HYDROGEN-BONDS; DENSITY-FUNCTIONAL THEORY; TRANS-CINNAMIC ACID; X-RAY; SPECTRA; NMR; DERIVATIVES

categoria

Chemistry

autores

Ribeiro-Claro, PJA; Vaz, PD; Nolasco, M

nossos autores

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