Synthesis and characterisation of molybdenum complexes bearing highly functionalised imido substituents 

Abstract

The monofunctionalised anilines 2-(H₂N)C₆H₄X (where X = CO₂H, SO₃H, or CN) reacted with sodium molybdate in the presence of NEt₃ and SiMe₃Cl in refluxing dme (1,2-dimethoxyethane) to give [NEt₃H][MoCl₃{2-(HN)C₆H₄ CO₂}{2-Me₃SiO₂CC ₆H₄N}] 1, [NEt₃H]₂[MoCl₃{2-NC₆H ₄SO₃}{2-(HN)C₆H₄ SO₃}] 2 and [MoCl₂(2-NCC₆H₄N)₂(dme)] 3. Treatment of sodium molybdate with anthranilic acid and 2,6-Prⁱ₂C₆H₃NH₂ in a 1∶1 ratio afforded [NEt₃H][MoCl₃{2-(HN)C₆H₄ CO₂}(NC₆H₃Prⁱ₂-2,6)] 4. Products of reactions of sodium molybdate with the amino acid 2,2-diphenylglycine and 2-aminoterephthalic acid, namely [NEt₃H][Mo- Cl₃(NCHPh₂)(H₂NCPh₂CO ₂)] 5 and [NEt₃H][MoCl₃{2-HNC₆H₃ CO₂(CO₂H)-1,4}{2-NC₆H₃ (CO₂H)₂-1,4}] 6 respectively are also reported. Complexes 1 to 6 have been structurally characterised; all contain pseudo-octahedral geometries about the metal centre, and all except 3 are salts in which the anion contains a mer arrangement of chloride ligands.

References

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