| Autor: |
Waddell, Paul G., Wallis, Jennifer F., Mattern, Annabelle, Higham, Lee J. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Crystallography; Dec2024, Vol. 54 Issue 4, p305-312, 8p |
| Abstrakt: |
New polymorphs of (2-(chloro(pyrrol-2-ylidene)methyl)pyrrole)-difluoro-borane (1) and (2-(chloro(4-ethyl-3,5-dimethyl-2H-pyrrol-2-ylidene)methyl)pyrrole)-4-ethyl-3,5-dimethyl-1H-pyrrolato)-difluoro-borane (2) were identified using single crystal X-ray diffraction. The new polymorph of 1 crystallises in the triclinic, P-1 space group with an asymmetric unit comprising two crystallographically-independent molecules (Z′ = 2). The differences between this structure and that of the known polymorph of 1 are attributed to the formation of two distinct dimer motifs in each polymorph and the packing between these dimer units. The new polymorph structure of 2, exhibits a similar asymmetric unit to the known form, comprising 3 molecules (Zʹ = 3). The two structures differ in the orientation of the molecules within the trimeric asymmetric unit and the manner in which these trimers pack along the crystallographic [010] direction. The triclinic polymorph of 8-chloro BODIPY exhibits an asymmetric unit with two crystallographically-independent molecules. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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