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Crystal structure of levomepromazine maleate.

ABSTRACT: The asymmetric unit of the title salt, C19H25N2OS(+)·C4H3O4 (-) [systematic name: (S)-3-(2-meth-oxy-pheno-thia-zin-10-yl)-N,N,2-tri-methyl-propanaminium hydrogen maleate], comprises two (S)-levomepromazine cations and two hydrogen maleate anions. The conformations of the two cations are similar. The major difference relates to the orientation of the meth-oxy substituent at the pheno-thia-zine ring system. The crystal components form a three-dimensional supra-molecular network via N-H?O, C-H?O and C-H?? inter-actions. A comparison of the conformations of the levomepromazine cations with those of the neutral mol-ecule and similar protonated mol-ecules reveals significant conformational flexibility of the pheno-thia-zine ring system and the substituent at the pheno-thia-zine N atom.

SUBMITTER: Gal GT

PROVIDER: S-EPMC4908531 | biostudies-other | 2016 May

REPOSITORIES: biostudies-other

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Crystal structure of levomepromazine maleate.

Gál Gyula Tamás GT May Nóra Veronika NV Bombicz Petra P

Acta crystallographica. Section E, Crystallographic communications 20160405 Pt 5

The asymmetric unit of the title salt, C19H25N2OS(+)·C4H3O4 (-) [systematic name: (S)-3-(2-meth-oxy-pheno-thia-zin-10-yl)-N,N,2-tri-methyl-propanaminium hydrogen maleate], comprises two (S)-levomepromazine cations and two hydrogen maleate anions. The conformations of the two cations are similar. The major difference relates to the orientation of the meth-oxy substituent at the pheno-thia-zine ring system. The crystal components form a three-dimensional supra-molecular network via N-H⋯O, C-H⋯O an ...[more]

PMID: 27308001

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