Crystal structure of dimethylammonium hydrogen oxalate hemi(oxalic acid)

Diallo, Waly; Gueye, Ndongo; Crochet, Aurélien; Plasseraud, Laurent; Cattey, Hélène

doi:10.1107/s2056989015005964

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Our group has been working on the interactions between alkylammonium ions with oxalic acid, and we have recently reported the crystal structure of (H 3 C) 2 NH + ÁHC 2 O 4 À Á-0.5H 2 C 2 O 4 (Diallo et al, 2015). Numerous other reports have described crystal structures containing acidic or neutral oxalate molecules interacting with a protonated amine, see for example: Vaidhyanathan et al (2002); Braga et al (2013); Said et al (2006); Hathwar et al (2010); Matulková et al (2008); Olenik et al (2003); Anda et al (2004).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structure of (ferrocenylmethyl)dimethylammonium hydrogen oxalate

Ndiaye¹,

Samb²,

Diop³

et al. 2015

Acta Cryst E

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Section: Chemical Contextmentioning

confidence: 99%

Crystal structure of (ferrocenylmethyl)dimethylammonium hydrogen oxalate

Ndiaye¹,

Samb²,

Diop³

et al. 2015

Acta Cryst E

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“…Oxalis corniculata, so called cat eaten plant in Korea, is different in color in green and smaller size compared to O. triangularis. The organic compound oxalic acid is isolated by François, Switzerland in 1773 from the wood-sorrel including plant O. corniculata and its crystal structure is revealed recently [11]. The oxalic acid is highly acidic which its pKa is 1.25 and 4.14 because it contains two carboxylate moieties [12].…”

Section: Introductionmentioning

confidence: 99%

Extracts of Oxalis triangularis shows broad spectrum antibacterial activity in acidic condition

Kim¹,

Ko²,

Kim³

et al. 2018

biomedicalresearch

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Antimicrobial effects of various plants have been widely used to prevent diseases. Antibacterial activity in the extracts of Oxalis triangularis against five Gram-positive bacteria and three Gram-negative bacteria was investigated. The extracts of O. triangularis were tested the antibacterial activity against several Gram (+) and Gram (-) bacteria. The antibacterial activity was tested in the heat-treated extracts from leaves of O. triangularis as well as in the extracts of the various pH by NaOH addition. The extracts from leaves, stems, roots, and buds of O. triangularis showed broad spectrum antibacterial activity against all bacteria tested including Staphylococcus aureus, Bacillus cereus, Escherichia coli and Salmonella typhimurium. The heat-treated extracts from leaves of O. triangularis showed the similar antibacterial activity. However, the antibacterial activity dramatically disappeared by pH change of the Oxalis extracts. These results indicated that the broad spectrum antibacterial activity in O. triangularis is from water soluble, heat-stable substances active only in acidic pH condition. Therefore, the antibacterial substances would be oxalic acid or oxalate compounds which are abundant in Oxalis family plants.

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