Quantitative Insights into the Crystal Structures of Nitro Derivatives of Ethyl (2E)-2-cyano-3-phenylprop-2-enoate: Inputs from X-Ray Diffraction, DFT Calculations and Hirshfeld Surface Analysis

2014 ◽  
Vol 44 (9) ◽  
pp. 450-458 ◽  
Author(s):  
Dhananjay Dey ◽  
Venugopal Prakash ◽  
Deepak Chopra ◽  
Vasu ◽  
Madnimaraiah Srinivas
CrystEngComm ◽  
2021 ◽  
Author(s):  
Muhammad Naeem Ahmed ◽  
Muneeba Arif ◽  
Hina Andleeb ◽  
Syed Wadood Ali Shah ◽  
Ifzan Arshad ◽  
...  

Three hydrazide-based Schiff bases have been synthesized and characterized by IR, UV-vis and X-ray diffraction methods. A detail analysis of intermolecular interactions has been performed by Hirshfeld surface analysis and DFT calculations.


2020 ◽  
Vol 44 (34) ◽  
pp. 14592-14603 ◽  
Author(s):  
Murtaza Madni ◽  
Muhammad Naeem Ahmed ◽  
Muhammad Hafeez ◽  
Muhammad Ashfaq ◽  
Muhammad Nawaz Tahir ◽  
...  

Two different π–π stacking modes are described, studied and characterized in the crystal structures of 4,5-dihydropyrazolyl–thiazole–coumarin hybrids, including a partial aliphatic ring.


Author(s):  
Rafika Bouchene ◽  
Zohir Lecheheb ◽  
Ratiba Belhouas ◽  
Sofiane Bouacida

Two new organic–inorganic hybrid compounds, triethylenetetraammonium hexachloridostannate (IV) dichloride dihydrate, (C6H22N4)[SnCl6]Cl2·2H2O, (I), and 1,4-bis(2-ammonioethyl)piperazin-1,4-diium hexachloridostannate (IV) dichloride dihydrate, (C8H24N4)[SnCl6]Cl2·2H2O, (II), have been synthesized from the same starting materials. In each case both the cations and anions are located about inversion centers. Their crystal structures exhibits alternating inorganic and organic stacking sheets in (I) and layers in (II), with Cl− ions and water molecules occupying the space in between. The cohesion of the three-dimensional frameworks are governed by N—H...Cl, N—H...O, C—H...Cl and O—H...Cl hydrogen bonds. Hirshfeld surface analysis of both crystal structures indicates that the H...Cl/Cl...H contacts exert an important influence on the stabilization of the packing.


Author(s):  
Ali Rayes ◽  
Manel Moncer ◽  
Irene Ara ◽  
Necmi Dege ◽  
Brahim Ayed

Abstract Two new organic–inorganic hybrid materials, based on 1,3-CycloHexaneBis-(Methyl Amine), abbreviated CHBMA, namely (H2CHBMA)ZnCl4·2H2O (CP1) and (H2CHBMA)CdI4·2H2O (CP2), have been synthesized under mild conditions in acidic media and characterized by single-crystal X-ray diffraction, spectroscopic techniques (13C NMR, FTIR, RAMAN) and thermal analysis. The crystal structures of the two compounds were solved by single-crystal X-ray diffraction methods. Both compounds show a 3-dimensional supramolecular structure directed by various interactions between tetrahalidometallate anions (ZnCl42−, CdI42−), water molecule and organic cations (H2CHBMA)2+. For both compounds, the cyclohexane ring of the template cation is in a chair conformation with the methylammonium substituent in the equatorial positions and the two terminal ammonium groups in a cis conformation but with two different orientations (upward for CP1 and downward for CP2) which influences the supramolecular architecture of the two structures. Hirshfeld surface analysis and the associated two-dimensional finger print plots were used to explore and quantify the intermolecular interactions in the crystals.


Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 369 ◽  
Author(s):  
Alexey V. Kletskov ◽  
Diego M. Gil ◽  
Antonio Frontera ◽  
Vladimir P. Zaytsev ◽  
Natalia L. Merkulova ◽  
...  

In this manuscript, the synthesis and single crystal X-ray diffraction characterization of four N-substituted 1,3,5-triazinanes are reported along with a detailed analysis of the noncovalent interactions observed in the solid state architecture to these compounds, focusing on C–H···π and C–H···O H-bonding interactions. These noncovalent contacts have been characterized energetically by using DFT calculations and also by Hirshfeld surface analysis. In addition, the supramolecular assemblies have been characterized using the quantum theory of “atoms-in-molecules” (QTAIM) and molecular electrostatic potential (MEP) calculations. The XRD analysis revealed a never before observed feature of the crystalline structure of some molecules: symmetrically substituted 1,3,5-triazacyclohexanes possess two chemically identical sulfonamide nitrogen atoms in different sp2 and sp3-hybridizations.


2018 ◽  
Vol 42 (15) ◽  
pp. 12570-12575 ◽  
Author(s):  
Chen Chen ◽  
Xiao-Tong He ◽  
Dan-Li Hong ◽  
Jing-Wen Wang ◽  
Yang-Hui Luo ◽  
...  

In this work, two new single crystals of copper-tetraphenylporphine (Cu-TPP) (crystals 2 and 3), which were induced by external magnetic fields with strengths of 0.5 and 0.8 T, respectively, have been prepared and characterized by single-crystal X-ray diffraction and Hirshfeld surface analysis.


CrystEngComm ◽  
2021 ◽  
Author(s):  
Marissa K. Melvin ◽  
Brian W. Skelton ◽  
Paul K. Eggers ◽  
Colin L. Raston

Single X-ray diffraction studies and Hirshfeld surface analysis of three transition metal coordination complexes of Py5Me2COOH reveals the ligand's diverse coordination utility and the structure directing effect of the carboxylate moiety.


2020 ◽  
Vol 44 (45) ◽  
pp. 19541-19554
Author(s):  
Aamer Saeed ◽  
Asma Khurshid ◽  
Ulrich Flörke ◽  
Gustavo A. Echeverría ◽  
Oscar E. Piro ◽  
...  

Based on experimental and computational data, a complex network of intermolecular interactions has been rationalized for antipyrine compounds.


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