Solid state form of centanafadine HCL and process for preparation thereof

A crystalline form CN1 of Centanafadine HCl, which is characterized by data selected from one or more of the following:

• i) an XRPD pattern having peaks at 12.6, 13.6, 18.7, 24.6 and 31.5 degrees 2-theta±0.2 degrees 2-theta;
• ii) an XRPD pattern as depicted in FIG. 1;
• iii) an XRPD pattern as depicted in FIG. 2;
• iv) a solid state 13C-NMR spectrum with peaks at 11.1, 23.4, 29.4, 30.5, 128.5 and 131.8 ppm±0.2 ppm;
• v) a solid state 13C-NMR spectrum having the following chemical shift absolute differences from a peak at 47.9 ppm±2 ppm of 36.8, 24.5, 18.5, 17.4, 80.6 and 83.9 ppm±0.1 ppm;
• or
• vi) a solid state 13C-NMR spectrum substantially as depicted in FIG. 3a.