SYNTHESIS AND CHARACTERIZATION OF DIOXOMOLYBDENUM(VI) CHELATES WITH DIBASIC FORM OF 5-BROMO-2-HYDROXYBENZOPHENONE S- METHYL/ETHYL-4-PHENYL- THIOSEMICARBAZONES

摘要

New dioxomolybdenum(VI) chelates with 2-hydroxybenzophenone S-R~1-4-phenyl-thiosemicarbazone [R~1=-CH3 (H2L~1), -C2H5 (H2L~2)] and some n-alcohols were synthesized in formula [MoO2(L)ROH] (R= C_nH_(2n+1); n=1-5). These mixed-ligand complexes were characterized by elemental analysis, molar conductivity, electronic, infrared and ~1H-NMR spectroscopies. The crystal structure of [MoO2(L~1)C5H_(11)OH] and [MoO2(L~2)CH3OH] chelates, which crystallized in the monoclinic space group P2_1, were determined by single crystal X-ray diffraction method. Effect of N(4)-phenyl substituent on the conjugation of chelate rings was discussed.