The crystal structure of ( E )-1-(((2-amino-4,5-dimethylphenyl)iminio)methyl)naphthalen-2-olate, C 19 H 18 N 2 O

C 19 H 18 N 2 O, orthorhombic, Pna 2 1 (no. 33), a = 21.838(2) Å, b = 13.9663(11) Å, c = 4.9806(4) Å, V = 1519.1(2) Å 3 , Z = 4, R gt ( F ) = 0.0702, w R ref ( F 2 ) = 0.1948, T = 293 K.


Experimental details
Absorption corrections were used by using multi-scan program [1].The structure was solved with OLEX2 and SHELX [2][3][4].Hydrogen atoms were placed in their geometrically idealized positions.Hydrogen atoms were constrained to ride on their parent atoms.

Comment
Schiff bases are a class of compounds formed by double bonding between carbon atoms and nitrogen atoms, their excellent coordination structure main due to the presence of C=N in the structure [5].Schiff bases are widely used in the construction of coordination compounds [6].Schiff bases and their metal complexes have different application prospects in magnetic material, catalysis, analytical chemistry, medicine, new energy materials, luminescence, or other fields [7,8].
The title molecule in the crystal structure is a flexible molecule and each title molecule contains one phenyl ring, one naphthyl ring and one C=N double bond.From the data of bond length and bond angle of the title Schiff base compound, it can be seen that the C=N double bond length N2⋯C9 in Schiff base is 1.299(7) Å, which is similar to the average bond length of the usual C=N double bond [9].In the title molecule, the C-C distances are in the range of 1.346(9) to 1.508(9) Å, the C-N distances are in the range of 1.375(8) to 1.405(7) Å, the C=O distance is 1.293(7) Å.

Conflict of interest statement:
The authors declare no conflicts of interest regarding this article.Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by the National Natural Science Foundation of China (No. 21171132, https:// doi.org/10.13039/501100001809),and Science Foundation of Weifang (2020ZJ1054).

Table  :
Data collection and handling.

Table  :
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å  ).