N-substituted monodentate alcohols as ligands modifying structure, properties and thermal stability of Mo(IV) complexes

• Three new Mo(IV) complexes with monodentate ligands were synthesised.
• All complexes have been characterized by single crystal X-ray crystallography.
• Analysis, IR, UV–Vis, CV and DTG are presented and discussed.

The reaction of N-substituted alcohols (2-aminoethanol, 3-amino-1-propanol and 2-hydroxyethylhydrazine) with K3Na[Mo(CN)4O2]⋅6H2O in water–ethanol solution results in isolation of three new complexes of formulae: (PPh4)2[Mo(CN)4O(amet)]⋅3H2O (1), (amet = 2-aminoethanol), (PPh4)2[Mo(CN)4O(ampro)]⋅3H2O (2) (ampro = 3-amino-1-propanol) and (PPh4)2[Mo(CN)4O(ethyd)]⋅3H2O (3) (ethyd = 2-hydroxyethylhydrazine). The isolated salts were characterized by elemental analysis, single crystal X-ray structure measurements, IR and UV–Vis spectroscopy and cyclic voltammetry. The complexes crystalize in triclinic space group with distorted octahedral geometry of the anion. The obtained salts belongs to a very rare group of complexes with monodentate terminal N-donating alcohols. The thermal stability is described for all complexes and compared with crystal structure parameters.

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