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Rao M. Uppu ; Sainath Babu ; Frank R. Fronczek Acta Crystallogr., Sect. E: Crystallogr. Commun.,2024,80(1):58-61. DOI: 10.1107/S2056989023010812 PubMed ID: 38312151
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Abstract: At room temperature, the title salt, C7H10NO+·Cl?, is ortho-rhom-bic, space group Pbca with Z′ = 1, as previously reported [Zhao (2009[Zhao, M. M. (2009). Acta Cryst. E65, o2378.]). Acta Cryst. E65, o2378]. Between 250 and 200?K, there is a solid-state phase transition to a twinned monoclinic P21/c structure with Z′ = 2. We report the high temperature structure at 250?K and the low-temperature structure at 100?K. In the low-temperature structure, the –NH3 hydrogen atoms are ordered and this group has a different orientation in each independent mol-ecule, in keeping with optimizing N—H?Cl hydrogen bonding, some of which are bifurcated: these hydrogen bonds have N?Cl distances in the range 3.1201?(8)–3.4047?(8)??. In the single cation of the high-temperature structure, the NH hydrogen atoms are disordered into the average of the two low-temperature positions and the N?Cl hydrogen bond distances are in the range 3.1570?(15)–3.3323?(18)??. At both temperatures, the meth-oxy group is nearly coplanar with the rest of the mol-ecule, with the C—C—O—C torsion angles being ?7.0?(2)° at 250?K and ?6.94?(12) and ?9.35?(12)° at 100?K. In the extended ortho-rhom-bic structure, (001) hydrogen-bonded sheets occur; in the monoclinic structure, the sheets propagate in the (010) plane.
Keywords: crystal structure ; 4-alk-oxy-acetanilides ; 4-alk-oxy-anilinium salts ; nonsteroidal analgesics ; mechanisms of toxicity
Purchased from AmBeed: 20265-97-8
CAS No. : | 20265-97-8 | MDL No. : | MFCD00036388 |
Formula : | C7H10ClNO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | VQYJLACQFYZHCO-UHFFFAOYSA-N |
M.W : | 159.61 | Pubchem ID : | 2734956 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
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