Co-crystal of suberic acid and 1,2-bis(4-pyridyl)ethane: A new case of packing polymorphism

Susano, Maria A. ; Martín-Ramos, Pablo (Universidad de Zaragoza) ; Maria, Teresa M.R. ; Folkersma, Steven ; Pereira, Laura C.J. ; Silva, Manuela Ramos

Resumen: The polymorphic behaviour of a co-crystal composed of neutral suberic acid and 1, 2-bis(4-pyridyl)ethane is reported. A multidisciplinary approach has been employed, using thermal analysis methods (differential scanning calorimetry and polarized light thermomicroscopy), spectroscopic methods (infrared spectroscopy) and X-ray single crystal and powder diffraction. Two new polymorphs, I and III; have been identified, and for one of them the crystal structure has been elucidated and compared to that of a known polymorph, form II, showing that the assembling of the molecules in chains via H-bonds is a common feature of both polymorphs. Polymorph II, obtained by crystallization from an aqueous or ethanol solution or by grinding, undergoes a solid-solid transition to polymorph I, which melts at 180.5 °C. Upon cooling from the melt, polymorph I is obtained, and a solid-solid transformation also occurs, to polymorph III''. Polymorph III was obtained serendipitously in an attempt to prepare a Nd(III) complex. The relative stability of the three polymorphic forms was established.

Idioma: Inglés

DOI: 10.1016/j.molstruc.2017.06.043

Año: 2017

Publicado en: JOURNAL OF MOLECULAR STRUCTURE 1147 (2017), 76-83
ISSN: 0022-2860

Factor impacto JCR: 2.011 (2017)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 86 / 146 = 0.589 (2017) - Q3 - T2

Factor impacto SCIMAGO: 0.409 - Analytical Chemistry (Q3) - Spectroscopy (Q3) - Organic Chemistry (Q3) - Inorganic Chemistry (Q3)

Tipo y forma: Article (PostPrint)

Área (Departamento): Area Ingeniería Agroforestal (Dpto. CC.Agrar.y Medio Natural)