Mössbauer study of some metal chelates of salicylhydroxamic acid and benzohydroxamic acid

Kane, S. N.; Gupta, Ajay; Ali, S. M.; Khadikar, Padmakar V.

doi:10.1007/bf02394525

Cited by 6 publications

(7 citation statements)

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“…A close look at the data in Table 4 indicates that the isomer shift and quadrupole splitting lie in the range 0.36 -0.39 mm/s and 0.74 -0.88 mm/s respectively. These values are consistent with those obtained for distorted Fe(ll) complexes [3]. As compared to the quadrupole splitting, isomer shift exhibits greater similarity.…”

Section: Resultssupporting

confidence: 90%

“…However, lower values of the Mossbauer parameters for the Fe(lll) chelates support that the oxidation state of iron in the present series of complexes is two. As stated earlier [3], the values of quadrupole splitting suggest considerable distortion from the octahedral symmetry supporting the results obtained from optical spectra.…”

Section: Resultssupporting

confidence: 89%

“…The values for isomer shift (IS) and quadrupole splitting (Q.S.) lie in the border range observed for Fe(ll) and Fe(lll) complexes [3]. We have also attempted the Mdssbauer investigations of the corresponding Fe(lll) complexes of salicylhydroxamic acids.…”

Section: Resultsmentioning

confidence: 88%

“…In complexes Fe-SHA, Fe-5CSHA and Fe-3,5DCSHA the salicylhydroxamic moiety (SHA) is a potentially tridentate. The three groups, namely phenolic, carbonyl and hydroxamic function (-N-OH) are involved in the coordination as indicated by stoichiometric composition, IR and visible spectra [3,4]. The effect of substitution in the benzene nucleus on the isomer shift is found to be very small.…”

Section: Resultsmentioning

confidence: 98%

“…However, the use of Mbssbauer parameters in understanding the nature of coordination sites in complexes and chelates has been rather limited. As a part of a research programme on the magnetic and spectral properties of coordination compounds in developing structure-activity relationship, we have recently [3] reported the Mossbauer study of some Fe-chelates of benzohydroxamic and salicylhydroxamic acids. In order to obtain more insight into the magnetic and structural behaviour of iron complexes of salicylhydroxamic acids, we have in the present work investigated the effect of the nature of coordination sites and varying chelate ring size in multiring chelates on the symmetry of the complexes by comparing the Mossbauer parameters of a few selectively chosen salicylhydroxamic acid complexes of iron(l1) : Fe-salicylhydroxamate(FeSHA), Fe-5-chloro salicylhydroxamate(Fe-5CSHA).…”

Section: Introductionmentioning

confidence: 99%

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Mössbauer Study of Some Polymeric Iron(II) Complexes of Halo‐Salicylhydroxamic Acids

Kane

Ali

Gupta

et al. 1990

Bulletin des Soc Chimique

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Polymeric complexes of iron (II) salicylhydroxamic acids: Fe‐SHA, Fe‐5CSHA, Fe‐3,5DCSHA along with Fe‐BHA, where SHA = salicylhydroxamic acid, 5CSHA = ‐5‐chloro salicylhydroxamic acid, 3,5DCSHA = 3,5 di‐chloro salicylhydroxamic acid and BHA = Benzohydroxamic acid, have been prepared, characterized by elemental and spectral analysis and identified by the electronic spectra as ML2.2H2O, where L stands for the salicylhydroxamic acid moiety and M stands for Fe(II). Various Mössbauer parameters obtained at room temperature, change with respect to the kinds of chelating agent which may be attributed to the effect of substitution in the salicylhydroxamic acid moiety. Quadrupole splitting and isomer shift values have been explained in terms of restricted rotation between C6H5‐°C‐ bond due to the π‐electron system in the benzene nucleus.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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