PREPARATION AND SPECTRAL INVESTIGATIONS ON OXOVANADIUM(IV) MACROCYCLIC COMPLEXES OF 4-METHYL-2,6-DI(FORMYL BENZOYL)PHENOL AND DIAMINES/

The synthesis and characterization of the complexes [VO(L)(SO)(4)]. 3H (2)O (1, 2) obtained from the oxovanadium(IV)-directed condensation of 4-methyl-2,6-diformylphenol (1) or 4-methyl-2,6-dibenzoylphenol (2) w ith diamines [ethylenediamine (a), 1,2-diaminopropane (b), 1,3-diamino propane (c) and o-phenylenediamine (d)] in EtOH in high yields is repo rted. Characterization of the compounds was based on elemental analyse s, conductivity, i.r., electronic and e.p.r. spectra and magnetic susc eptibility measurements. Available evidence supports a distorted octah edral environment around vanadium(IV). E.p.r spectra of polycrystallin e samples are consistent with an axially compressed d(xy)(1) configura tion.