X-ray crystal structure and vibrational spectra of hydrazides and their metal complexes. Part I. Catena-poly[di-μ-aqua-(μ-maleic hydrazidato-O)sodium] hydrate

Morzyk-Ociepa, Barbara

doi:10.1016/j.molstruc.2006.09.021

Cited by 22 publications

(4 citation statements)

References 34 publications

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“…The observed MH3 Raman spectrum at ambient pressure observed by us agrees well with that reported by Morzyk-Ociepa, 23 so we made the assignments of Raman peaks on the basis of that result. In this work, the Raman spectra of MH3 were measured at pressure as great as 5 GPa.…”

Section: ■ Results and Discussionsupporting

confidence: 88%

“…It is of considerable interest to investigate the molecular and crystal structures of maleic hydrazide (3-hydroxypyridazin-6-one, MH), a well-known plant growth inhibitor in agriculture . There are many studies on the tautomerism of MH under various experimental conditions. ,− All of these studies have conclude that the existence of MH exclusively as oxo–hydroxy tautomer. Cradwick suggested that MH molecules act like pyrimidine or purine analogue by base pair interactions with adenine or uracil and thymine .…”

Section: Introductionmentioning

confidence: 99%

“…As depicted in Figure b, these molecules are inclined to the mean plane (100) of the hydrogen-bonded ribbons. Additionally, an extensive study exploring the vibrational spectra of hydrogen bonds in MH3 has been conducted . Therefore, it is critical to understand the structural stability and changes of hydrogen-bonded supramolecular aggregates of MH3 under high pressure.…”

Section: Introductionmentioning

confidence: 99%

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High-Pressure-Induced Polymorphic Transformation of Maleic Hydrazide

et al. 2014

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Maleic hydrazide, a unique example of polymorphic structures, was analyzed at pressure up to 5 GPa using in situ high-pressure Raman scattering and synchrotron X-ray diffraction techniques. Changes in the Raman spectra at 2 GPa indicate that a pressure-induced phase transition is occurring. The transition was further analyzed with angle dispersive X-ray diffraction, which demonstrated that maleic hydrazide underwent a polymorphic transformation from the form III to the form II. Moreover, the observed transformation was partially reversible when the system was brought back to ambient pressure. This work suggests that the high-pressure polymorphic transformation is caused by changes in the hydrogen-bonded ribbons which lead to supramolecular rearrangements in the crystal structure.

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Section: ■ Results and Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Pressure-Induced Polymorphic Transformation of Maleic Hydrazide

et al. 2014

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“…Tautomerism of solid maleic hydrazide was studied experimentally using infrared 19,20 and Raman spectroscopies. The structure and tautomerism of maleic hydrazide were also the subject of several computational studies [21][22][23][24][25][26][27] .…”

Section: Oriental Journal Of Chemistrymentioning

confidence: 99%

A Theoretical Survey of Solvation Effects on Tautomerism Stability of Maleic Hydrazide

Heidarnezhad¹,

Heidarnezhad²,

Heydari³

et al. 2013

Orient. J. Chem

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Computational calculations at mp2/cc-pvdz level were employed in the study of tautomers of maleic hydrazide (MH) in the gas phase and selected solvents such as benzene , tetrahydrofuran ethanol, methanol, dimethyl sulfoxide and water using PCM model. All tautomers are optimized at this level. The results show that the tautomer MH2 is more stable than the other tautomers. In addition, stability of the tautomers in different solvents shows interesting results. Variation of dipole moments and NBO charges on atoms in the solvents were studied.

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