The title complex, K+. CH3OCH2COO-. 4H(2)O, forms a network in which K atom
s are nine-coordinate, bonding to a carboxylate O atom and the ether O atom
of each of two different methoxyacetate groups, to both carboxylate O atom
s of a third group, to a single carboxylate O atom of a fourth group and al
so to two water molecules. Additional water molecules are involved in hydro
gen bonding Co the polymeric complex.