Spectral studies of complexes of some trivalent transition metals with isonitrosodibenzoylmethane and isonitrosothiodibenzoylmethane

The complexes of isonitrosodibenzoylmethane and isonitrosothiodibenzoylmethane with Cr [III], Fe [III] and Go [III] were synthesized and analytically characterized. In terms of the IR and Nujol Mull Spectra of the respective chelates, the mode of bonding and the stereochemistry of the investigated systems were discussed

Spectral, thermal and electrical characterization of Fe [II] 1,3 diphenyl-2-oximo-1,3 propandione with some heterocyclic bases

Iron [II] complexes of the type Fe [II] L2 B2 where L: 1,3 diphenyl 12-oximo- 1,3- propandione and B : pyridine, thiophene or furane, were synthesized and characterized by IR, DTA and electrical conductivity measurements. The presence of the respective heterocyclic bases help to stabilise the oxidation state of Fe [II] during its interaction with concerned oxime -1,3- diketone. The obtained data suggested the following descending order of relative thermal stability of the concerned adduct complexes. Fe [II] L[2] [Pyridine][2] > Fe [II] L[2] [Furane][2] > Fe [II] L[2] [Thiophene]. Furthermore, both of the thiophene and furane adduct complexes exhibited Semiconducting character in the temperature range 30-130 degree. Fe [II] L[2] [pyridine][2] showed such semiconducting behaviour only up to 90 degree. The calculated values of the activation energy of the electrical conductivity decreased in the following order: Fe [II] L[2] [Furane][2] > Fe [II] L[2] [Pyridine][2] > Fe [II] L[2] [Thiophene][2]