• BIKSHANDARKOIL R SRINIVASAN

      Articles written in Journal of Chemical Sciences

    • Syntheses, structure and properties of Alkaline-earth metal salts of 4-Nitrophenylacetic acid

      BIKSHANDARKOIL R SRINIVASAN KIRAN T DHAVSKAR CHRISTIAN NÄTHER

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      The synthesis, crystal structure, spectral characteristics and thermal properties of alkaline-earth metal salts of 4-nitrophenylacetic acid (4-npaH) namely, [Mg(H₂O)₆](4-npa)₂·4H₂O (4-npa = 4-nitrophenylacetate) (1), [Ca(H₂O)₂(4-npa)₂] (2) and [Sr(H₂O)₃(4-npa)₂]·4.5H₂O(3) are reported. In 1, the 4-npa ion functions as a charge balancing counter anion for the octahedral [Mg(H₂O)6]²⁺ unit with the Mg(II) ion situated on a centre of inversion. The two unique lattice water molecules link the [Mg(H₂O)₆]²⁺ cations and 4-npa anions with the aid of O-H· · ·O interactions. Compounds 2 and 3 are one-dimensional (1-D) coordination polymers containing an eight coordinated Ca(II) situated in a general position and a nine coordinated Sr(II) located on a twofold axis. The μ₂-bridging tridentate binding modes of the crystallographically independent 4-npa ligands in 2 and the unique 4-npa ligand in 3 link the bivalent metal ions into an infinite chain with alternating Ca· · · Ca separations of 3.989 and 4.009 Å, respectively, and a single Sr· · · Sr separation of 4.194Å in the 1-D chain.

    • Comments on ‘‘Carbonyl releasing Schiff base complex of Fe (III): synthesis, physicochemical characterization, antimicrobial and anticancer studies’’

      BIKSHANDARKOIL R SRINIVASAN

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      The authors of the title paper (J. Chem. Sci. (2020) 132 44) claim to have synthesized and characterized a carbonyl releasing Schiff base complex of Fe(III) to study its antimicrobial and anticancer properties. A critical analysis of the reported claims reveals that the so-called carbonyl releasing Schiff base complex formulated as containing two carbonyl (CO) ligands bonded to a pentavalent iron, is a dubious material. In this letter to the Editor, it is proved that the title paper is completely erroneous.

      A so-called carbonyl releasing Schiff base complex formulated as containing two CO ligands bonded to a pentavalent iron, is a dubious material.

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