Siddappa A. Patil
Karnatak University
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Featured researches published by Siddappa A. Patil.
Metal-based Drugs | 2007
Kalagouda B. Gudasi; Vidyadhar C. Havanur; Siddappa A. Patil; Basavaraj R. Patil
New lanthanide(III) complexes with 2-[2-hydroxy-3-methoxyphenyl]-3-[hydroxyl-3-methoxybenzylamino]-1,2-dihydroquin- azoline-4(3H)-one (Hmpbaq) have been synthesized and characterized by elemental analysis, conductance measurements, magnetic susceptibilities, spectroscopic (IR, NMR, UV, EPR), and thermal studies. Molar conductance studies indicate 1 : 1 electrolytic behavior for these complexes. IR spectra indicate that Hmpbaq acts as a tridentate ligand coordinating through carbonyl oxygen, benzyl amine nitrogen, and deprotonated phenolic oxygen. TG and DTA studies of La(III) and Pr(III) complexes indicate the presence of two coordinated water molecules. Based on these studies, the complexes have been formulated as [La(mpbaq)2(H2O)2]·NO3, where Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Th(III), Dy(III), and Y(III). The ligand, lanthanide(III) salts, and the corresponding complexes have been simultaneously screened for their antibacterial and antifungal activities and compared with the drugs in use.
Bioinorganic Chemistry and Applications | 2006
Kalagouda B. Gudasi; Rashmi V. Shenoy; Ramesh S. Vadavi; Manjula S. Patil; Siddappa A. Patil; Rayappa R. Hanchinal; Srinivas A. Desai; H. Lohithaswa
The synthesis and characterisation of lanthanide(III) and yttrium(III) nitrate complexes of benzimidazole-2-acetic acid (HBIA) are reported. The complexes have been characterised by elemental analysis, molar conductance, magnetic studies, IR, 1H NMR, UV-visible, EPR, and TG/DTA studies. They have the stoichiometry [Ln3(BIA)2(NO3)7(H2O)4] · 3H2O where Ln=La(III), Pr(III), Nd(II), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), and Y(III). The effect of La(III) complex on germination, coleoptile, and root length of two local varieties of wheat DWR-195 and GW-349 for different treatment periods has been investigated. The complex was found to exhibit enhanced activity, compared to HBIA or metal salt alone at lower treatment periods.
Journal of Coordination Chemistry | 2007
Kalagouda B. Gudasi; Ramesh S. Vadavi; Rashmi V. Shenoy; Siddappa A. Patil; Munirathinam Nethaji
Transition metal [Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II)] complexes of a new Schiff base, 3-acetylcoumarin-o-aminobenzoylhydrazone were synthesized and characterized by elemental analyses, magnetic moments, conductivity measurements, spectral [Electronic, IR, 1H and 13C NMR, EPR] and thermal studies. The ligand crystallizes in the monoclinic system, space group P21/n with a = 9.201(5), b = 16.596(9), c = 11.517(6) Å, β = 101.388(9)°, V = 1724.2 (17) Å3 and Z = 4. Conductivity measurements indicated Mn(II) and Co(II) complexes to be 1 : 1 electrolytes whereas Ni(II), Cu(II), Zn(II) and Cd(II) complexes are non-electrolytes. Electronic spectra reveal that all the complexes possess four-coordinate geometry around the metal.
Transition Metal Chemistry | 2006
Kalagouda B. Gudasi; Siddappa A. Patil; Ramesh S. Vadavi; Rashmi V. Shenoy; Munirathinam Nethaji
Transition Metal Chemistry | 2006
Kalagouda B. Gudasi; Manjula S. Patil; Ramesh S. Vadavi; Rashmi V. Shenoy; Siddappa A. Patil; Munirathinam Nethaji
Chemical & Pharmaceutical Bulletin | 2005
Kalagouda B. Gudasi; Rashmi V. Shenoy; Ramesh S. Vadavi; Manjula S. Patil; Siddappa A. Patil
Inorganica Chimica Acta | 2006
Kalagouda B. Gudasi; Siddappa A. Patil; Ramesh S. Vadavi; Rashmi V. Shenoy; Munirathinam Nethaji; Sim Wan Annie Bligh
Inorganica Chimica Acta | 2005
Kalagouda B. Gudasi; Ramesh S. Vadavi; Rashmi V. Shenoy; Manjula S. Patil; Siddappa A. Patil; Munirathinam Nethaji
Journal of The Serbian Chemical Society | 2006
Kalagouda B. Gudasi; Siddappa A. Patil; Ramesh S. Vadavi; Rashmi V. Shenoy; Manjula S. Patil
Transition Metal Chemistry | 2006
Kalagouda B. Gudasi; Ramesh S. Vadavi; Rashmi V. Shenoy; Siddappa A. Patil; Munirathinam Nethaji