Some structure-property relationships for conducting LB films based on semiamphiphilic TCNQ salts with closed shell cations are worked out. Formation of a 3-D ordered structure containing (TCNQ-)2 dimers on the water subphase followed by a remarkable structural rearrangement of deposited films upon iodination is found to be a necessary requirement for conductivity. Among the studied salts, these processes occur only for those with similar cations.