then the mass of the complex will be 476.36. As the electron impact ionization of the solid samples has been performed, ionization of the molecular complex might have possible,
if the same ionization has been performed by liquid sampling method (by dissolving the sample in suitable solvent later subjected to ionization) the two components might have separated and the detection of the complex might not have been possible.
For the co-crystals, ACF-NI NG the presence of m/z peak at 484.82 indicates the formation of the molecular complex and for the ACF-NI the m/z peak at 477 also represents the same.
The appearance of separate m/z peaks at 353 and 122 in both ACF-NI and ACF-NI NG ensures that no covalent bonds have been formed and the bonds between the Aceclofenac and Nicotinamide were weak hydrogen bonds and so separated during ionization.