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  • Jotani, Mukesh M.  (3)
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  • 1
    Online Resource
    Online Resource
    International Union of Crystallography (IUCr) ; 2019
    In:  Acta Crystallographica Section E Crystallographic Communications Vol. 75, No. 10 ( 2019-10-01), p. 1472-1478
    In: Acta Crystallographica Section E Crystallographic Communications, International Union of Crystallography (IUCr), Vol. 75, No. 10 ( 2019-10-01), p. 1472-1478
    Abstract: In the title tri-substituted thiourea derivative, C 13 H 18 N 2 O 3 S, the thione-S and carbonyl-O atoms lie, to a first approximation, to the same side of the molecule [the S—C—N—C torsion angle is −49.3 (2)°]. The CN 2 S plane is almost planar (r.m.s. deviation = 0.018 Å) with the hydroxyethyl groups lying to either side of this plane. One hydroxyethyl group is orientated towards the thioamide functionality enabling the formation of an intramolecular N—H...O hydrogen bond leading to an S (7) loop. The dihedral angle [72.12 (9)°] between the planes through the CN 2 S atoms and the 4-tolyl ring indicates the molecule is twisted. The experimental molecular structure is close to the gas-phase, geometry-optimized structure calculated by DFT methods. In the molecular packing, hydroxyl-O—H...O(hydroxyl) and hydroxyl-O—H...S(thione) hydrogen bonds lead to the formation of a supramolecular layer in the ab plane; no directional interactions are found between layers. The influence of the specified supramolecular interactions is apparent in the calculated Hirshfeld surfaces and these are shown to be attractive in non-covalent interaction plots; the interaction energies point to the important stabilization provided by directional O—H...O hydrogen bonds.
    Type of Medium: Online Resource
    ISSN: 2056-9890
    Language: Unknown
    Publisher: International Union of Crystallography (IUCr)
    Publication Date: 2019
    detail.hit.zdb_id: 2843762-7
    detail.hit.zdb_id: 2041947-8
    Location Call Number Limitation Availability
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  • 2
    Online Resource
    Online Resource
    International Union of Crystallography (IUCr) ; 2020
    In:  Acta Crystallographica Section E Crystallographic Communications Vol. 76, No. 2 ( 2020-02-01), p. 155-161
    In: Acta Crystallographica Section E Crystallographic Communications, International Union of Crystallography (IUCr), Vol. 76, No. 2 ( 2020-02-01), p. 155-161
    Abstract: In the title compound, C 12 H 15 N 3 O 5 S, a trisubstituted thiourea derivative, the central CN 2 S chromophore is almost planar (r.m.s. deviation = 0.018 Å) and the pendant hydroxyethyl groups lie to either side of this plane. While to a first approximation the thione-S and carbonyl-O atoms lie to the same side of the molecule, the S—C—N—C torsion angle of −47.8 (2)° indicates a considerable twist. As one of the hydroxyethyl groups is orientated towards the thioamide residue, an intramolecular N—H...O hydrogen bond is formed which leads to an S (7) loop. A further twist in the molecule is indicated by the dihedral angle of 65.87 (7)° between the planes through the CN 2 S chromophore and the 4-nitrobenzene ring. There is a close match between the experimental and gas-phase, geometry-optimized (DFT) molecular structures. In the crystal, O—H...O and O—H...S hydrogen bonds give rise to supramolecular layers propagating in the ab plane. The connections between layers to consolidate the three-dimensional architecture are of the type C—H...O, C—H...S and nitro-O...π. The nature of the supramolecular association has been further analysed by a study of the calculated Hirshfeld surfaces, non-covalent interaction plots and computational chemistry, all of which point to the significant influence and energy of stabilization provided by the conventional hydrogen bonds.
    Type of Medium: Online Resource
    ISSN: 2056-9890
    Language: Unknown
    Publisher: International Union of Crystallography (IUCr)
    Publication Date: 2020
    detail.hit.zdb_id: 2843762-7
    detail.hit.zdb_id: 2041947-8
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    International Union of Crystallography (IUCr) ; 2019
    In:  Acta Crystallographica Section E Crystallographic Communications Vol. 75, No. 3 ( 2019-03-01), p. 308-318
    In: Acta Crystallographica Section E Crystallographic Communications, International Union of Crystallography (IUCr), Vol. 75, No. 3 ( 2019-03-01), p. 308-318
    Abstract: The analysis of atom-to-atom and/or residue-to-residue contacts remains a favoured mode of analysing the molecular packing in crystals. In this contribution, additional tools are highlighted as methods for analysis in order to complement the `crystallographer's tool', PLATON [Spek (2009). Acta Cryst . D 65 , 148–155]. Thus, a brief outline of the procedures and what can be learned by using Crystal Explorer [Spackman & Jayatilaka (2009). CrystEngComm 11 , 19–23] is presented. Attention is then directed towards evaluating the nature, i.e . attractive/weakly attractive/repulsive, of specific contacts employing NCIPLOT [Johnson et al. (2010). J. Am. Chem. Soc . 132 , 6498–6506]. This is complemented by a discussion of the calculation of energy frameworks utilizing the latest version of Crystal Explorer . All the mentioned programs are free of charge and straightforward to use. More importantly, they complement each other to give a more complete picture of how molecules assemble in molecular crystals.
    Type of Medium: Online Resource
    ISSN: 2056-9890
    Language: Unknown
    Publisher: International Union of Crystallography (IUCr)
    Publication Date: 2019
    detail.hit.zdb_id: 2843762-7
    detail.hit.zdb_id: 2041947-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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