Abstract
Two crystal structures of chalcones, or 1,3-diarylprop-2-en-1-ones, are
presented; both contain a methyl substitution on the 3-Ring, but differ on the
1-Ring, bromo versus cyano. The compounds are 30-bromo-4-methylchalcone
[systematic name: 1-(2-bromophenyl)-3-(4-methylphenyl)prop-2-en-1-one],
C16H13BrO, and 30-cyano-4-methylchalcone {systematic name: 2-[3-(4-methylphenyl)
prop-2-enoyl]benzonitrile}, C17H13NO. Both chalcones meaningfully
add to the large dataset of chalcone structures. The crystal structure of 30-cyano-
4-methylchalcone exhibits close contacts with the cyano nitrogen that do not
appear in previously reported disubstituted cyanochalcones, namely interactions
between the cyano nitrogen atom and a ring hydrogen atom as well as a methyl
hydrogen atom. The structure of 30-bromo-4-methylchalcone exhibits a type I
halogen bond, similar to that found in a previously reported structure for
4-bromo-30-methylchalcone.
presented; both contain a methyl substitution on the 3-Ring, but differ on the
1-Ring, bromo versus cyano. The compounds are 30-bromo-4-methylchalcone
[systematic name: 1-(2-bromophenyl)-3-(4-methylphenyl)prop-2-en-1-one],
C16H13BrO, and 30-cyano-4-methylchalcone {systematic name: 2-[3-(4-methylphenyl)
prop-2-enoyl]benzonitrile}, C17H13NO. Both chalcones meaningfully
add to the large dataset of chalcone structures. The crystal structure of 30-cyano-
4-methylchalcone exhibits close contacts with the cyano nitrogen that do not
appear in previously reported disubstituted cyanochalcones, namely interactions
between the cyano nitrogen atom and a ring hydrogen atom as well as a methyl
hydrogen atom. The structure of 30-bromo-4-methylchalcone exhibits a type I
halogen bond, similar to that found in a previously reported structure for
4-bromo-30-methylchalcone.
Original language | English |
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Pages (from-to) | 1496-1502 |
Number of pages | 7 |
Journal | Acta Crystallographica Section E: Crystallographic Communications |
Volume | E76 |
DOIs | |
Publication status | Accepted/In press - 25 Aug 2020 |
Keywords
- crystal structure
- chalcone
- bromo
- cyano
- halogen bond
- n-stacking
- edge-to-face