(<i>m</i>-Carboxyphenyl)ammonium perchlorate at 223 K

Bendjeddou, Lamia; Cherouana, Aouatef; Berrah, Fadila; Benali-Chérif, Nourredine

doi:10.1107/s1600536803006457

Cited by 11 publications

(14 citation statements)

References 7 publications

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“…The mean deviation of the ammonium exocyclic group from the least-squares plane of the phenyl ring is very small [À0.0178 (9) Å ] and corresponds to a (1 ) out-of-plane bending of the C4-N1 bond. The ammonium NH þ 3 group is slightly staggered from the plane of the benzene ring; this staggered conformation was found in a number of mcarboxyphenylammonium salts (Benali-Cherif et al, 2002;Bendjeddou et al, 2003) and it appears to be preferred over the eclipsed conformation observed previously in mcarboxyphenylammonium bisulfate (Cherouana et al, 2003). The geometrical features of the m-carboxyphenylammonium cations are also in accordance with other similar compounds (see, for example, Arora et al, 1973).…”

Section: Figuresupporting

confidence: 79%

Isostructural phase transition in m-carboxyphenylammonium monohydrogenphosphite

Bendeif¹,

Dahaoui²,

François

et al. 2005

Acta Crystallogr Sect B

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Crystals of m-carboxyphenylammonium monohydrogenphosphite, C7H8NO2+.H2PO3- (m-CPAMP), space group P2(1)/c, grown from aqueous solution undergo a reversible first-order single-crystal phase transition at Tc = 246 (2) K with a hysteresis of 3.6 K. The thermal behaviour of the sample was characterized by differential scanning calorimetry (DSC) experiments. Variations of the unit-cell parameters versus temperature between 100 and 320 K are reported. The transition from the higher-temperature phase (HTP) to the lower-temperature phase (LTP) is characterized by a unit-cell volume contraction of 1.77%. The average structure and unit-cell packing of m-CPAMP at lower temperature (100 K) are reported from accurate X-ray data sets and compared with those of the higher-temperature phase (293 K) in order to investigate the mechanism of the phase transition. The reciprocal lattice reconstruction showed a few very weak satellite reflections which will be discussed in a forthcoming paper.

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Section: Figuresupporting

confidence: 79%

Isostructural phase transition in m-carboxyphenylammonium monohydrogenphosphite

Bendeif¹,

Dahaoui²,

François

et al. 2005

Acta Crystallogr Sect B

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“…All other refinement details are available in the CIF (CCDC: 1401464). (2) 8.2058 (12) 114.691 (19) 2323.6(6) The Valance bond sum (1.995 A°) [30][31][32] confirms that the nickel ion in our complex is as A°and 109.47° (17), respectively, confirming a tetrahedral configuration (Table 3 and 4), similar to other perchlorates studied at low temperature) [37][38][39].…”

Section: Structuresupporting

confidence: 59%

Synthesis, crystal structures, hydrogen bonding graph-sets and theoretical studies of nickel (+II) co-ordinations with pyridine-2,6-dicarboxamide oxime

Hamdaoui

Messai

Benyza

et al. 2017

J. Fundam and Appl Sci.

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“…The asymmetric unit, formed by one Mn 2+ metal ion, two crystallographically independent oxime ligands and two perchlorate counter-ion located on general positions. The molecular structure of the compound showing the atom numbering scheme is shown in Figure. 1 (17), respectively, confirming a tetrahedral configuration , similar to other perchlorates studied at low temperature) [20,[22][23][24].…”

Section: Structuresupporting

confidence: 55%