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Cyperus scariosus R.Br. (Nagarmotha) is pestiferous perennial, delicate slender sedge found wildly in various parts of the country, especially in damp or marshy areas and collected wildly for extraction of its essential oil using steam distillation. The rhizomes of C. scariosus possess pleasant aromatic odour, the essential oil is used as anti-inflammatory, anti-microbial and anti-fungal agent and it is also used as one of the ingredients in several formulations for the Ayurvedic systems of medicine. Phytochemical studies have shown that the major chemical components of this herb are polyphenol, flavonol, glycoside, alkaloid, saponins, sesquiterpenoids and essential oil. Rhizome of the plant is used in fever, arthritis, diuretic, nervine tonic, treatment of diarrhea and dysentery, leprosy, bronchitis, amenorrhea and blood disorders. The fruits of the plant are used as carminative, diuretic tonic and have stomachic. The details of plant and its essential oil, chemical constituents and biological activities have been described in this review.

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Synthesis of some new coordination complexes of main group metals (Ba, Ca, Mg, Sr, and Pb) with 2‐mercaptopyridine‐3‐carboxylic acid (H2Mpc) and hydrazine mixed ligands and their characterization through various chemical and spectral analyses are described in this article. With the help of analytical data obtained from mass, elemental (CHNS), hydrazine content, and metal content analysis, the molecular formulae of the complexes have been proposed as [Ba(N2H4)2(HMpc)H2O], [Ca(N2H4)2(HMpc)(H2O)2], [Sr(N2H4)(HMpc)(H2O)3], [Mg(N2H4)4(HMpc)].4H2O and [Pb(N2H4)5(HMpc)2]. The vibrational (FT‐IR and Raman) spectral data exposes that the 2‐mercaptopyridine‐3‐carboxylic acid coordinates with metal ion via both carboxylate‐O and thiolate‐S in the mode of bi‐dentate dianion while the hydrazine acts as bridging bi‐dentate. On thermal decomposition, these complexes dehydrate to give metal 2‐mercaptopyridine‐3‐carboxylate intermediates, which on further decomposition (heating upto 750°C) give the metal carbonates in the cases of Ba, Ca and Sr, and metal oxides for Mg and Pb. The in vitro antibacterial and antifungal activity of the ligand and its complexes are studied against five bacteria (Bacillus cereus, Staphylococcus aureus, Proteus vulgaris, Pseudomonas aeruginosa and Escherichia coli) and four fungi (Candida albicans, Aspergillus niger, Aspergillus fumigatus, and Penicilium variance).