Because HN(CH3)2 is detected during both TDMAA and NH3 pulses, (Fig. and Fig. ) while CH4 is only detected during the NH3 pulse (Fig. ), it is reasonable to assume that CH4 evolves as either a ligand decomposition (illustrated later in reaction ( )), or a reductive elimination product, that has possibly undergone hydrogenation reactions upon interaction with NH3, which acts as an atomic H source and this reaction pathway can be illustrated as follows: