Behavioural dynamics in the biological control of pests: role of silicon complexes

Belwal, Savita; Fahmi, Nighat; Singh, Ranvir

doi:10.1002/aoc.1426

Cited by 14 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…al. [12][13][14] recently, reported the activity of Schiff base complexes with silicon against the pathogenic fungi and bacteria. The insecticidal and nematicidal activities were also reported for some hypercoordinate silicon complexes with sulphonamide imine 15 as ligand.…”

Section: Introductionmentioning

confidence: 99%

Novel hexacoordinate organosilicon(IV) complexes of diethylenetriamine Schiff base with SiO2N3 skeleton

Puri¹,

Singh²,

Kaur³

et al. 2009

Arkivoc

View full text Add to dashboard Cite

Some novel hexacoordinate silicon(IV) complexes with a SiO 2 N 3 skeleton were synthesized by using potentially pentadentate ligand N, N'-diethylenetriamine-bis(salicylideneimine). The aforesaid ligand, obtained by the condensation of diethylenetriamine and salicylaldehyde, contains two N of azomethine C=N group, two O of phenolic -OH group and one N of -NHgroup capable of coordination. The ligand reacts with RSiCl 3 (R = CH 3 , C 6 H 5 , C 2 H 5 , CH=CH 2 ) in the presence of triethylamine to yield hexacoordinate silicon complexes 1-4. The resulting complexes were characterized by IR spectroscopy, 1 H, 13 C, 29 Si NMR spectroscopy and elemental analysis. The geometry and hexacoordination was confirmed by comparing the experimental results with computational studies by using GAUSSIAN 03 series of programs. The IR frequencies and 29 Si NMR shifts calculated for isomer B with Density Functional Theory (B3LYP-3-21+G* basis set) correlate with experimental values and suggested the geometry of synthesized complexes. Total energies, dipole moment and bond lengths were calculated from the geometries optimized with semi-empirical methods.

show abstract

Section: Introductionmentioning

confidence: 99%

Novel hexacoordinate organosilicon(IV) complexes of diethylenetriamine Schiff base with SiO2N3 skeleton

Puri¹,

Singh²,

Kaur³

et al. 2009

Arkivoc

View full text Add to dashboard Cite

show abstract

“…The formation of a variety of metal complexes from these ligands speak for their spectacular progress in coordination and bioinorganic chemistry [1]. The metal derivatives of 1H-indol-2,3-dione thiosemicarbazone are found to have remarkable antifungal, antibacterial and antifertility properties [2][3][4]. Thiosemicarbazones and semicarbazones and their manganese(II) complexes have remarkable potential for inhibiting growth of various pathogenic microorganisms and this property has been exploited in pharmacological applications.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Biochemical Studies of Some Manganese(II), Oxovanadium(V) and Dioxomolybdenum(VI) Complexes S/O and N Donor Agents Synthesized under Microwave Conditions

Garg

Saini

Fahmi

et al. 2006

Transition Met Chem

Self Cite

View full text Add to dashboard Cite

The synthesis of some new manganese(II), oxovanadium(V) and dioxomolybdenum(VI) complexes with 5-chloro-1,3-dihydro-3-[2-(phenyl)-ethylidene]-2H-indol-2-one-hydrazinecarbothioamide (L 1 H) and 5-chloro-1,3-dihydro-3-[2-(phenyl)-ethylidene]-2H-indol-2-one-hydrazinecarboxamide (L 2 H) were carried out in unimolar and bimolar ratios. All the new derivatives have been characterized by elemental analyses, molecular weight determinations, molar conductance, magnetic measurements, i.r., 1 H-n.m.r. and e.s.r. studies. The i.r. and n.m.r. spectral data suggest the involvement of sulphur/oxygen and azomethine nitrogen in coordination to the central metal ion. The magnetic moment values of the manganese(II) complexes are in the 5.85-6.13 B.M. range, suggesting a high spin state in these complexes. Based on these spectral studies tetrahedral geometry for the manganese(II) complexes and octahedral geometry for the molybdenum complexes has been proposed. In the case of the oxovanadium complexes vanadium is in the penta and hexa coordinated environments. Compounds have been synthesized in an open vessel under microwave irradiation (MWI) using a domestic microwave oven. The reaction time decreases from hours to minutes with improved yield as compared to conventional heating. The free ligands and their metal complexes have been tested in vitro against a number of microorganisms in order to assess their antimicrobial properties. The results indicate that the ligands and their respective metal derivatives possess antimicrobial properties.

show abstract

“…The IR spectra of the ligands (Table I) display sharp bands around 3500-3320 cm −1 assignable to NH 2 group. 21 These bands remain unchanged in the complexes, indicating their non-involvement in coordination. Two medium-intensity bands in the regions 3240-3230 cm −1 and 1050-1040 cm −1 due to ν(NH) and ν(C S) vibrations, respectively, in the ligands disappear in the spectra of the complexes, which indicates that complexation takes place through the nitrogen and sulfur atoms.…”

Section: Spectroscopymentioning

confidence: 96%

Sulfur-Containing Schiff Base Complexes of Iron(III) and Lead(II): Synthesis, Characterization, Antimicrobial Activity, and Their Electrochemical Behaviors

Malik

Kumari

Chauhan

et al. 2010

Phosphorus, Sulfur, and Silicon and the Related Elements

View full text Add to dashboard Cite

The sulfur-nitrogen donor ligands, thiosemicarbazones of 5-nitro-1H-indole-2,3-dione and 6-nitro-1H-indole-2,3-dione and 5-chloro-1H-indole-2,3-dione, have been prepared by the condensation of thiosemicarbazide with respective ketones in 1:1 molar ratio in ethanol medium. Lead and iron complexes were prepared by the reaction of lead(II) chloride and iron(III) chloride with the ligands in a 1:2 molar ratio, respectively. The newly synthesized complexes have been characterized by elemental analysis, melting point determinations, and UV, ESR, and IR spectral studies. In all the complexes, the monobasic bidentate nature of the ligand is evident. Based on analytical and spectral data, hexacoordinated structure for lead and pentacoordinated structure for iron complexes have been proposed. Antibacterial and antifungal studies of these compounds against various pathogenic bacterial and fungal strains have been carried out. One of the ligands and its metal complexes were screened for their antifertility activity.

show abstract

Behavioural dynamics in the biological control of pests: role of silicon complexes

Cited by 14 publications

References 18 publications

Novel hexacoordinate organosilicon(IV) complexes of diethylenetriamine Schiff base with SiO2N3 skeleton

Novel hexacoordinate organosilicon(IV) complexes of diethylenetriamine Schiff base with SiO2N3 skeleton

Spectroscopic and Biochemical Studies of Some Manganese(II), Oxovanadium(V) and Dioxomolybdenum(VI) Complexes S/O and N Donor Agents Synthesized under Microwave Conditions

Sulfur-Containing Schiff Base Complexes of Iron(III) and Lead(II): Synthesis, Characterization, Antimicrobial Activity, and Their Electrochemical Behaviors

Contact Info

Product

Resources

About