Home The crystal structure of N-(6-chloro-2-methyl-2H-indazol-5-yl)acetamide, C10H10ClN3O
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The crystal structure of N-(6-chloro-2-methyl-2H-indazol-5-yl)acetamide, C10H10ClN3O

  • Yi-Jing Du , Hong-Shun Sun ORCID logo , Jian-Qiang Wang and Cheng Guo ORCID logo EMAIL logo
Published/Copyright: June 1, 2023

Abstract

C10H10ClN3O, monoclinic, P21/c (no. 14), a = 4.7273(7) Å, b = 10.2148(16) Å, c = 21.283(3) Å, β = 91.458(4)°, V = 1027.4(3) Å3, Z = 4, R g t (F) = 0.0623, w R r e f (F 2) = 0.1287, T = 193 K.

CCDC no.: 2263798

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: 0.23 × 0.20 × 0.15 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.35 mm−1
Diffractometer, scan mode: Rigaku Mercury, Graphite Monochromator
θ max, completeness: 27.5°, >99%
N(hkl) measured , N(hkl) unique, R int: 6853, 2344, 0.046
Criterion for I obs, N(hkl) gt: I obs > 2σ(I obs), 1706
N(param) refined: 142
Programs: CrystalClear [1], Olex2 [2], SHELX [3, 4]
Table 2:

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

Atom x y z U iso*/U eq
Cl1 0.11780 (17) 0.08569 (8) 0.57527 (4) 0.0408 (2)
O1 0.7893 (4) 0.2507 (2) 0.42905 (10) 0.0362 (5)
N1 0.9433 (5) 0.4723 (2) 0.69723 (13) 0.0319 (6)
N2 0.7694 (5) 0.3748 (3) 0.71506 (12) 0.0343 (6)
N3 0.3650 (5) 0.2464 (3) 0.47584 (12) 0.0305 (6)
H3 0.188 (7) 0.235 (3) 0.4717 (15) 0.039 (10)*
C1 1.1173 (7) 0.5388 (3) 0.74463 (16) 0.0411 (8)
H1A 1.0272 0.5324 0.7855 0.062*
H1B 1.1375 0.6312 0.7331 0.062*
H1C 1.3045 0.4977 0.7472 0.062*
C2 0.9421 (6) 0.4946 (3) 0.63565 (16) 0.0330 (7)
H2 1.0504 0.5584 0.6145 0.040*
C3 0.7509 (6) 0.4060 (3) 0.60817 (14) 0.0281 (6)
C4 0.6502 (6) 0.3339 (3) 0.65979 (14) 0.0284 (6)
C5 0.4476 (6) 0.2349 (3) 0.65020 (15) 0.0320 (7)
H5 0.3740 0.1870 0.6844 0.038*
C6 0.3610 (6) 0.2103 (3) 0.58970 (15) 0.0288 (7)
C7 0.6556 (6) 0.3789 (3) 0.54654 (15) 0.0298 (7)
H7 0.7239 0.4278 0.5121 0.036*
C8 0.4634 (6) 0.2811 (3) 0.53708 (14) 0.0281 (6)
C9 0.5340 (6) 0.2300 (3) 0.42641 (15) 0.0294 (7)
C10 0.3925 (7) 0.1819 (4) 0.36700 (16) 0.0413 (8)
H10A 0.4596 0.2329 0.3313 0.062*
H10B 0.1871 0.1921 0.3699 0.062*
H10C 0.4383 0.0893 0.3609 0.062*

1 Source of material

The title compound was prepared by the reaction of 6-chloro-2-methyl-2H-indazol-5-amine (10 mmol) and acetic acid (10 mL) under reflux for 3 h. After the reaction was completed, the solution was put into ice water (20 mL), and filtered. The residue was purified by flash column chromatography. Colorless block crystals of the title compound were obtained by slow evaporation from a solution of ethyl acetate at room temperature.

2 Experimental details

Using Olex2 [2], the structure was solved with the ShelXT [3] package and refined with the ShelXL [4] program. H atoms bound to C and N atoms were positioned geometrically and allowed to ride on their parent atoms, with C–H = 0.95 Å (phenyl), 0.98 Å (methyl) and with U iso(H) = 1.5U eq(C), and N–H = 0.85 Å and U iso(H) = 1.3U eq(N).

3 Comment

The well known 2H-indazoles, an important class of N-heterocycles, is a frequently found motif in drug substances with important biological activities such as antitumor [5, 6], insecticidal [7], antiprotozoal [8] and antiviral [9].

Single-crystal structure analysis revealed that the asymmetric unit consists of one N-(6-chloro-2-methyl-2H-indazol-5-yl)acetamide molecule. The indazole moiety (N1–N2/C2–C8) is planar with an r.m.s. deviation from the mean plane of 0.0692 Å. The acetamino group (N3/C9–C10/O1) and indazole ring are not in the same plane, which is similar to some reported structures of 2H-indazols derivatives [10], [11], [12], [13]. The dihedral angle of them is 43.9 Å. In the solid state structure, classical N–H ⋯ O and weak C–H ⋯ N and C–H ⋯ O hydrogen-bonding interactions result in a chain along [100].


Corresponding author: Cheng Guo, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, People’s Republic of China, E-mail:

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

  2. Research funding: Natural Science Foundation of Jiangsu Province (No. BK20181486), Natural Science Foundation of Jiangsu Higher Education Institutions (No.17KJB320001), Key Program of Nanjing Polytechnic Institute (No. NJPI-2022–02) and Qing Lan Project of Jiangsu Province.

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

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Received: 2023-04-20
Accepted: 2023-05-18
Published Online: 2023-06-01
Published in Print: 2023-08-28

© 2023 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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