molecular structure of xxx.salt

[synthesys]

At which point does the HCL, SO4, CO3, etc... attach to the MDA, MDMA molecule?
     H             H
    /             /
R-N       ? R-N        ?
    \             \  /H
     H             C-H
                     \H

How do the HCL, SO4, etc... attach?

Why will this not happen to imines?

    /CH3
R-N

[Rhodium]

In MDMA.HCl only the H⁺ from the HCl attaches to the MDMA molecule, bonding to the nitrogen and making the latter positively charged. The negatively charged Cl^- which is then "left over" does not covalently bond to anything, it just hangs around nearby (in a solution) to even out the electric charges.

In the MDMA.HCl crystals, the positive and negative ions end up in a lattice, where every other ion is positive or negative, repectively, much like as in a

sodium chloride crystal

(http://www.avogadro.co.uk/definitions/ionic.htm) which consists of Na⁺ and Cl^- ions instead.