Home The crystal structure of N′-[bis(2-hydroxyphenyl)methylidene]pyridine-4-carbohydrazide, C19H15N3O3
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The crystal structure of N′-[bis(2-hydroxyphenyl)methylidene]pyridine-4-carbohydrazide, C19H15N3O3

  • Itumeleng B. Setshedi ORCID logo , Andreas Lemmerer ORCID logo and Mark G. Smith ORCID logo EMAIL logo
Published/Copyright: September 13, 2022

Abstract

C19H15N3O3, monoclinic, C2/c (no. 15), a = 20.6917(6) Å, b = 10.1392(3) Å, c = 16.9544(5) Å, β = 115.739(1)°, V = 3204.07(17) Å3, Z = 8, R gt (F) = 0.0364, wR ref (F 2) = 0.1009, T = 173 K.

CCDC no.: 2167402

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Colourless block
Size: 0.36 × 0.25 × 0.20 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.10 mm−1
Diffractometer, scan mode: Bruker D8 Venture Photon, ω
θ max, completeness: 28.0°, >99%
N(hkl)measuredN(hkl)uniqueR int: 23,999, 3872, 0.037
Criterion for I obs, N(hkl)gt: I obs > 2 σ(I obs), 3340
N(param)refined: 238
Programs: Bruker [1], SHELX [2, 3], ORTEP-3 [4], WinGX [5], PLATON [6]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

Atom x y z U iso*/U eq
C1 −0.18530 (6) 0.48217 (11) 0.00875 (7) 0.0229 (2)
C2 −0.18090 (7) 0.59801 (12) −0.03244 (8) 0.0313 (3)
H2A −0.135895 0.629967 −0.02665 0.038*
C3 −0.24367 (7) 0.66582 (13) −0.08216 (8) 0.0357 (3)
H3A −0.240643 0.744564 −0.110745 0.043*
C4 −0.31206 (6) 0.51342 (12) −0.05324 (8) 0.0309 (3)
H4 −0.357842 0.483541 −0.060549 0.037*
C5 −0.25246 (6) 0.43823 (11) −0.00302 (8) 0.0266 (2)
H5 −0.257386 0.358104 0.022907 0.032*
C6 −0.12008 (6) 0.39996 (11) 0.06116 (7) 0.0222 (2)
C7 0.06093 (5) 0.48892 (10) 0.18322 (7) 0.0188 (2)
C8 0.05681 (5) 0.63347 (10) 0.16316 (7) 0.0192 (2)
C9 0.03440 (6) 0.67069 (11) 0.07594 (8) 0.0273 (2)
H9 0.023726 0.604289 0.032532 0.033*
C10 0.02733 (7) 0.80184 (12) 0.05115 (8) 0.0352 (3)
H10 0.012886 0.825523 −0.008337 0.042*
C11 0.04170 (7) 0.89814 (12) 0.11462 (9) 0.0341 (3)
H11 0.036033 0.988493 0.09816 0.041*
C12 0.06415 (6) 0.86438 (10) 0.20145 (8) 0.0261 (2)
H12 0.0739 0.931475 0.244231 0.031*
C13 0.07259 (5) 0.73183 (10) 0.22665 (7) 0.0195 (2)
C14 0.13043 (6) 0.42320 (10) 0.23167 (7) 0.0203 (2)
C15 0.13587 (6) 0.28567 (11) 0.24744 (7) 0.0244 (2)
C16 0.20348 (7) 0.22849 (12) 0.29311 (8) 0.0302 (3)
H16 0.207129 0.136371 0.30448 0.036*
C17 0.26498 (7) 0.30374 (13) 0.32192 (8) 0.0321 (3)
H17 0.310523 0.263249 0.35287 0.038*
C18 0.26061 (6) 0.43870 (13) 0.30584 (8) 0.0301 (3)
H18 0.302982 0.490499 0.325066 0.036*
C19 0.19407 (6) 0.49667 (11) 0.26166 (7) 0.0246 (2)
H19 0.191331 0.589034 0.25127 0.03*
N1 −0.06094 (5) 0.47504 (9) 0.10727 (6) 0.0233 (2)
N2 −0.30829 (6) 0.62593 (10) −0.09190 (7) 0.0324 (2)
N3 0.00444 (5) 0.41459 (9) 0.15336 (6) 0.02117 (19)
O1 −0.12054 (4) 0.28042 (8) 0.05804 (6) 0.0318 (2)
O2 0.09561 (4) 0.69679 (8) 0.31188 (5) 0.02388 (18)
O3 0.07849 (5) 0.20449 (8) 0.21997 (6) 0.0337 (2)
H1 −0.0664 (8) 0.5585 (16) 0.1199 (10) 0.037 (4)*
H2 0.1230 (10) 0.768 (2) 0.3467 (12) 0.062 (5)*
H3 0.0405 (11) 0.2535 (19) 0.1922 (12) 0.058 (5)*

Source of material

All reagents used were used without further purification. An amount of 0.0857 g of isonicotinic acid hydrazide (isoniazid) (0.6249 mmol) and 0.1340 g of 2,2′-dihydroxybenzophenone (0.6255 mmol) were added into a vial. p-Hydroxybenzoic acid 0.086 g (0.6255 mmol) was added to catalyze the reaction. The solids were dissolved in 3 mL of AP-grade methanol and refluxed in a closed screw-top vial for 24 h at 67 °C, and were left to stand at room temperature slightly open to the atmosphere. Yellow plates were afforded after 3 days.

Experimental details

C-bound hydrogen atoms were located in the difference map then positioned geometrically and were allowed to ride on their respective parent atoms with thermal displacement parameters 1.2 times of the parent C atom. The coordinates and isotropic displacement parameters of the N-bound and O-bound H atoms involved in hydrogen bonding interactions were allowed to refine freely.

Comment

Isoniazid has been modified to enhance activity against multidrug resistant mycobacteria [7]. Several modified isoniazid derivative have been synthesized [8], [9], [10], [11], [12]. In this paper we present the crystal structure of isoniazid modified with 2,2′-dihydroxybenzophenone. The compound crystallizes in the monoclinic C2/c space group and the asymmetric unit contains one molecule. There is one hydroxyl group on each of the benzophenone rings. As expected from Etter’s rules of hydrogen bonding [13], one of the hydroxyl groups forms a six-membered intramolecular hydrogen bonded ring with the hydrazide nitrogen atom (N3) and is not involved in anyntermolecular interactions. The other hydroxyl group is hydrogen bonded to the pyridyl nitrogen atom of an adjacent molecule via the robust O–H…Npyridine heterosynthon. Its oxygen atom acts as an acceptor to the amide hydrogen atom donor (H1). The packing of the crystal forms one-dimensional ribbons with a two-one screw axis. These hydrogen bonding patterns form two rings, namely an R 4 4 (18) ring involving four molecules, and an  R 4 4 (14) ring involving three molecules.


Corresponding author: Mark G. Smith, Department of Chemistry, University of South Africa, Unisa Science Campus, 28 Pioneer Avenue, Florida, Roodepoort, Gauteng, South Africa, E-mail:

Funding source: National Research Foundation (South Africa) Thuthuka Grant

Award Identifier / Grant number: 118127

Award Identifier / Grant number: 117850

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the National Research Foundation (NRF) Thuthuka Grant Number 118127 as well as Thuthuka Grant Number 117850.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2022-07-13
Accepted: 2022-08-26
Published Online: 2022-09-13
Published in Print: 2022-12-16

© 2022 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

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