NDLI: Magnetic & Spectral Properties of Oxovanadium ( IV ) Complexes with Tridentate Dibasic DNO Donor Schiff Bases Derived from Isopropanolamine & Substituted Salicylaldehydes

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Magnetic & Spectral Properties of Oxovanadium ( IV ) Complexes with Tridentate Dibasic DNO Donor Schiff Bases Derived from Isopropanolamine & Substituted Salicylaldehydes

Content Provider	Semantic Scholar
Author	Salicylaldehydes, Substituted
Copyright Year	2015
Abstract	Oxovanadium(IV) complexes of tridentate dibasic ONO donor Schiff bases derived from salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-dichlorosalicylaldehyde, 5-bromosalicylaldehyde, 3methoxysalicylaldehyde, 2-hydroxynaphthaldehyde and isopropanolamine have been synthesized and characterized by elemental analysis, infrared, electronic and ESR spectra, and magnetic susceptibility measurements from 83 to 297°K. They are insoluble in common solvents and decompose above 250°Cwithout melting. Subnormal magnetic moments (!left = 0·81-1·27BM at room temperature) have been observed for all the complexes. The effective magnetic moments of the complexes decrease significantly as the temperature is lowered indicating the presence of antiferromallnetic exchanlle in the complexes. The exchange integral (-J) of these oxovanadium(IV) complexes are in the ranl1e 350-470 cm-'. The ESR spectra of the complexes exhibit the half-field spectra around 1600gauss due to the AMsJ= ±2 transition suggesting the presence of triplet state (S = I) in these complexes. On the basis of magnetic susceptibility and ESR data a dimeric structure with singlet ground state (S = 0) has been proposed for these complexes. The V = 0 stretching frequencies of the complexes occur around 980 em-I.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://nopr.niscair.res.in/bitstream/123456789/53060/1/IJCA%2015A(5)%20431-433.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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