Microwave chemistry is a green chemical method that improves reaction conditions and product yields while reducing solvent amounts and reaction times. This paper deals with the synthesis, spectral and biological studies of germanium(IV) complexes with chelating hydrazones derived from 1‐(pyridine‐2‐yl)ethanone (F1) and 1‐(furan‐2‐yl)ethanone (F2) with isonicotinohydrazide (INH). The complexes have been synthesized under a microwave–green chemical approach and investigated using a combination of microanalytical analysis, melting point, IR spectra, 1H NMR spectra and 13C NMR spectra. Trimethylgermanium(IV)chloride and triphenylgermanium(IV)chloride interact with the hydrazones in a 1:1 molar ratio (metal:ligand), resulting in the formation of coloured products. On the basis of conductance and spectral evidence, a pentacoordinated structure for germanium(IV) complexes has been assigned for these products. The ligand is coordinated to the germanium(IV) via the azomethine nitrogen atom and the enolic oxygen atom. The free ligands and their metal complexes have been tested in male rats in order to assess their antifertility properties. Ligands and their metal complexes have also been tested in vitro against a number of pathogenic microorganisms in order to assess their antimicrobial and pesticidal properties. Both the ligands and their complexes were found to possess appreciable antifertility activity and other activities, which have been discussed in brief. Copyright © 2013 John Wiley & Sons, Ltd.

β-Glucosidase (EC 3.2.1.21) was extracted from different parts of Rauvolfia serpentina and was purified using ammonium sulphate fractional precipitation and Sephadex G-25 chromatography. The molecular weight of different bands in Rauvolfia serpentina was found in the range of 19.4KDa to 92.257KDa .The enzyme β-glucosidase has optimum pH 5.0 and the optimum temperature was found at 60ºC while the thermal stability of enzyme β-glucosidase was found to be 30ºC. The activation with FeSO 4 is due to Fe ++ ions because FeCl 3 do not activate the enzyme.

Biologically potent complexes of aluminum(III) and gallium(III) derived from semicarbazone of 3-acetylcoumarin have been synthesized under microwave irradiation and investigated using a combination of microanalytical analysis, melting point, ultraviolet spectra, infrared spectra, 1 H nuclear magnetic resonance (NMR) spectra, and 13 C NMR spectra. Aluminum and gallium isopropoxides interact with the ligand, resulting in the formation of colored products. Based on conductance and spectral evidences, a fi ve-coordinated structure for aluminum(III) and gallium(III) complexes has been assigned for 1:1 ratio and a six-coordinated structure for 1:2 and 1:3 ratios. The ligand is coordinated to the aluminum(III) and gallium(III) via the azomethine nitrogen atom and the enolic oxygen atom. The free ligand and its metal complexes have been tested in vitro against a number of pathogenic microorganisms in order to assess their antimicrobial and pesticidal properties. Both the ligand and its complexes were found to possess appreciable bactericidal and pesticidal properties.

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