“…Thus, the structures of alkali metal salts, i.e. Na + , K + (Smith, 2013), Rb + (Smith, 2014a) and Cs + (Smith & Wermuth, 2011) have been described along with a number of ammonium salts, i.e. with NH 4 , as a hydrate (Smith, 2014b), dicyclohexylammonium (Smith et al, 2004), guanidinium, as a hydrate (Smith et al, 2007), morpholinium (Smith & Lynch, 2016) and ethylenediammonium, as a dihydrate (Smith et al, 2002).…”