synthesis and spectral studies on thorium (iv) coordination compounds of 4-[n-(2-hydroxybenzalidene)amino] antipyrinesmeicarbazone and 4-[n-cinnamalidene) amino] antipyrine semicarbazone

نویسندگان

ram k. agrawal

indranil chakraborti

n.k. sharma

چکیده

the stereochemistry of the actinide elements has recently undergone considerable development and a wide variety of coordination numbers and geometries have been observed. this structural versatility arises from the lack of strong crystal field effects for the 5f-electronic configurations as well as from the large ionic radii of these metal ions, which change markedly with oxidation number, or atomic number for the actinides. to review the concept, in the present work, we wish to report the synthesis and spectral properties of some new thorium (iv) conplexes of 4-(n-(2-hydroxybenzalidene)amino] antipyrine semicarbazone (hbaaps) and 4-[n-cinnamalidene)-amino] antipyrine emicarbazone (caaps) with the general composition thx4.2l (x=cl¯, br¯, i¯, ncs¯ or cio4¯ and th(no3)4.l (l=hbaaps or caaps). the infrared data suggest that the semicarbazones behave as tridentate n,n,o-donors. in conclusion thorium (iv) displays coordination numbers 6, 8, 10 or 11 depending on the nature of coordinating anions of these coordination compounds.

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Synthesis and Spectral Studies on Thorium (IV) Coordination Compounds of 4-[N-(2-Hydroxybenzalidene)amino] AntipyrineSmeicarbazone and 4-[N-Cinnamalidene) amino] ANtipyrine Semicarbazone

The stereochemistry of the actinide elements has recently undergone considerable development and a wide variety of coordination numbers and geometries have been observed. This structural versatility arises from the lack of strong crystal field effects for the 5f-electronic configurations as well as from the large ionic radii of these metal ions, which change markedly with oxidation number, ...

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Synthesis and Studies of Spectral and Thermal Properties of Some Mixed Ligand Complexes of Thorium(IV) and Dioxouranium(VI) With Semicarbazones as Primary Ligand and Sulfoxide as Secondary Ligand

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synthesis and characterization of some lanthanide(iii) chloro complexes derived from 4[n-(4’-hydroxy-3’-methoxybenzalidene) amino] antipyrine semicarbazone and 4[n-(3’,4’,5’-trimethoxybenzalidene) amino]antipyrine semicarbazone

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synthesis and studies of spectral and thermal properties of some mixed ligand complexes of thorium(iv) and dioxouranium(vi) with semicarbazones as primary ligand and sulfoxide as secondary ligand

the present work describes the studies on the coordination behaviour of 4[n-(benzalidene) amino]antipyrine semicarbazone (baaps) (i), 4[n-(furfural)amino]antipyrine semicarbazone (ffaaps) (ii) and 4[n-(cinnamalidene)amino]antipyrine semicarbazone (caaps) (iii) in presence of dimethyl sulfoxide (dmso) or diphenyl sulfoxide (dpso) towards th4+ and uo22+ salts. all the complexes were isolated in n...

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عنوان ژورنال:
iranian journal of chemistry and chemical engineering (ijcce)

ناشر: iranian institute of research and development in chemical industries (irdci)-acecr

ISSN 1021-9986

دوره 21

شماره 2 2002

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