Synthesis and characterization of cyano complexes of oxotungsten(IV) with morpholinomethyl urea and related ligands

The synthesis and characterization of complexes, (Ph₃P)₂NH₂[WO(CN)₃L-L] · 3H₂O and Cs[WO(CN)₃L-L] · H₂O (where L-L = morpholinomethylurea, morpholinomethylthiourea, piperidinomethylurea, piperidinomethylthiourea, pyrrolidinomethylurea, and pyrrolidinomethythiourea) are presented. The complexes have been prepared by the reaction of K₃Na[WO₂(CN)₄] · 6H₂O with morpholinomethylurea and related ligands in aqueous solution around a pH of 7. These have been isolated as bis(triphenylphospine)imminium or cesium salts. The complexes have been characterized by elemental analysis, ℝ, UV-Vis spectra, magnetic susceptibility and conductivity measurements in addition to TGA/DTA The text was submitted by the authors in English.