![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
Sunlight irradiation of the reactions of [M(CO)6], M = Cr, Mo and W with salicylaldehyde isonicotinic acid hydrazone (H2salnah) in THF were investigated. Interaction of [Cr(CO)6] with H2salnah resulted in formation [Cr2O2(H2salnah)2]. The corresponding reactions of molybdenum and tungsten carbonyls yielded dinuclear oxo complexes [M2O6(H2salnah)]. All complexes were characterized by elemental analysis, IR, mass spectrometry and 1H NMR spectroscopy. The IR spectra of complexes exhibited bands due to either terminal or bridged metal oxygen bonds. Magnetic measurement of [Cr2O2(H2salnah)2] showed it has paramagnetic characteristics with high spin d4 configuration and μeff of 1.27 BM. Electronic spectra of the complexes in DMF displayed visible bands due to ligand-to-metal charge transfer. Thermal properties of the complexes were investigated by thermogravimetry technique.