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.