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Crystal structure of 1,3-dihy-droxy-2-(hy-droxy-meth-yl)propan-2-aminium 2-(4-iso-butyl-phen-yl)propano-ate: a simple organic salt of racemic ibuprofen.

ABSTRACT: In the title organic salt of ibuprofen with trometamol, C4H12NO3 (+)·C13H17O2 (-), the carb-oxy-lic acid group of ibuprofen has transferred its proton to the amino N atom of trometamol. In the crystal, the trometamol cations are linked via N-H?O hydrogen bonds, forming chains along [001]. To these chains are attached the ibuprofen anions via O-H?O and N-H?O hydrogen bonds. The chains are linked via further N-H?O and O-H?O hydrogen bonds, forming sheets parallel to (100). Two C atoms of the propano-ate substituent in the ibuprofen anion are disordered over two sets of sites and were refined with a fixed occupancy ratio of 0.7:0.3.

SUBMITTER: Lou B

PROVIDER: S-EPMC4571357 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature

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Crystal structure of 1,3-dihy-droxy-2-(hy-droxy-meth-yl)propan-2-aminium 2-(4-iso-butyl-phen-yl)propano-ate: a simple organic salt of racemic ibuprofen.

Lou Benyong B

Acta crystallographica. Section E, Crystallographic communications 20150711 Pt 8

In the title organic salt of ibuprofen with trometamol, C4H12NO3 (+)·C13H17O2 (-), the carb-oxy-lic acid group of ibuprofen has transferred its proton to the amino N atom of trometamol. In the crystal, the trometamol cations are linked via N-H⋯O hydrogen bonds, forming chains along [001]. To these chains are attached the ibuprofen anions via O-H⋯O and N-H⋯O hydrogen bonds. The chains are linked via further N-H⋯O and O-H⋯O hydrogen bonds, forming sheets parallel to (100). Two C atoms of the propa ...[more]

PMID: 26396756

Similar Datasets

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Crystal structures of the 1:1 salts of 2-amino-4-nitro-benzoate with each of (2-hy-droxy-eth-yl)di-methyl-aza-nium, tert-but-yl(2-hy-droxy-eth-yl)aza-nium and 1,3-dihy-droxy-2-(hy-droxy-meth-yl)propan-2-aminium.

Project description:The crystal and mol-ecular structures of the title mol-ecular salts, C4H12NO+·C7H5N2O4 -, (I), C6H16NO+·C7H5N2O4 -, (II), and C4H12NO3 +·C7H5N2O4 -, (III), are described. The common feature of these salts is the presence of the 2-amino-4-nitro-benzoate anion, which exhibit non-chemically significant variations in the conformational relationships between the carboxyl-ate and nitro groups, and between these and the benzene rings they are connected to. The number of ammonium-N-H H atoms in the cations increases from one to three in (I) to (III), respectively, and this variation significantly influences the supra-molecular aggregation patterns in the respective crystals. Thus, a linear supra-molecular chain along [100] sustained by charge-assisted tertiary-ammonium-N-H?O(carboxyl-ate), hy-droxy-O-H?O(carboxyl-ate) and amino-N-H?O(carboxyl-ate) hydrogen-bonds is apparent in the crystal of (I). Chains are connected into a three-dimensional architecture by methyl-C-H?O(hy-droxy) and ?-? inter-actions, the latter between benzene rings [inter-centroid separation = 3.5796?(10)?Å]. In the crystal of (II), a supra-molecular tube propagating along [901] arises as a result of charge-assisted secondary-ammonium-N-H?O(carboxyl-ate) and hy-droxy-O-H?O(carboxyl-ate) hydrogen-bonding. These are connected by methyl-ene- and methyl-C-H?O(nitro) and ?-? stacking between benzene rings [inter-centroid separation = 3.5226?(10)?Å]. Finally, double-layers parallel to (100) sustained by charge-assisted ammonium-N-H?O(carboxyl-ate), ammonium-N-H?O(hy-droxy) and hy-droxy-O-H?O(carboxyl-ate) hydrogen-bonds are apparent in the crystal of (III). These are connected in a three-dimensional architecture by amine-N-H?O(nitro) hydrogen-bonds.

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Project description:The crystal structure of the title salt, [Fe(C(5)H(5))(C(15)H(19)NO)](C(4)H(5)O(2)), consists of discrete ammonium and carboxyl-ate ions, which associate into infinite chains parallel to [100] by means of N-H?O and O-H?O inter-actions. These chains are further cross-linked into a three-dimensional network by additional C-H?O contacts and by offset ?-? stacking inter-actions of inversion-related aromatic rings [centroid-centroid distance = 3.7040?(14)?Å]. The mol-ecular parameters of the ionic components are in no way unexpected, the geometry of the ammonium cation being similar to that found in other structurally characterized salts obtained from N-ferrocenylmethyl ?-amino-alcohols. The (E)-but-2-enoate anion consists of two approximately planar subunits, viz the delocalized carboxyl-ate unit and the butenyl group (the latter being planar within ca. 0.002?Å), which are mutually rotated by 30.3?(4)°.

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