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Cruz\u2010Cabeza C.\u2005R. Groom CrystEngComm2011 DOI:."},{"key":"e_1_2_2_23_2","unstructured":"In an earlier article the identification of the trienol tautomer was mainly based on15N NQS (nonquaternary suppression) NMR data. However upon repeating the measurements using different spectral editing techniques (two types of NQS and the dipolar dephasing pulse sequence all from the standard Bruker library with several dephasing periods) we obtained puzzling results. This prompted us to perform new NMR experiments and extract the N\uf8ffH distances from heteronuclear dipolar coupling (see the Supporting Information)."},{"key":"e_1_2_2_24_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889806042117"},{"key":"e_1_2_2_25_2","unstructured":"A.\u2005A. Coelho:TOPAS\u2010AcademicVersion 4.1 Coelho Software Brisbane Australia."},{"key":"e_1_2_2_26_2","unstructured":"Barbituric acid phase\u2005IV. 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