Synthesis and crystal structure of catena-poly[[[aqua-{2-[(E)-(1-cyano-2-imino-2-meth-oxy-ethyl-idene)hydrazin-yl]benzene-sulfonato}-sodium]-di-μ-aqua] dihydrate].

In the polymeric title compound, {[Na(C(10)H(9)N(4)O(4)S)(H(2)O)(3)]·2H(2)O} (n) , sixfold coordinated Na(+) cations are linked into a chain parallel to [010] by sharing common water mol-ecules. Next to the four bridging water mol-ecules, each Na(+) cation of the chain is bonded to the O atom of a terminal water mol-ecule and an O atom of the SO(3) (-) group of the sulfonate anion. Classical O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds and additional π-π inter-actions connect these chains into a three-dimensional network.