Crystal Structure of 2-pyridine-2-yl-3(pyridine-2-carboxylideneamino)quinazolin-4(3H)-one and its Ligating Diversity Towards Transition Metal(II) Ions |
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Authors: | Kalagouda B Gudasi Ramesh S Vadavi Rashmi V Shenoy Siddappa A Patil Munirathinam Nethaji |
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Institution: | (1) Department of Chemistry, Karnatak University, Dharwad, 580 003, India;(2) Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560 012, India |
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Abstract: | The synthesis of a new ligand 2-pyridine-2-yl-3(pyridine-2-carboxylideneamino)-quinazolin-4(3H)-one (PPCAQ) is described together
with its manganese(II), cobalt(II), nickel(II), copper(II), zinc(II) and cadmium(II) complexes. The single crystal X-ray diffraction
studies of the ligand reveal the presence of two crystallographically independent molecules in asymmetric unit cell, which
exhibit N…N attractive interaction. The PPCAQ and its metal complexes were characterized by analytical, spectroscopic (i.r.,
n.m.r and u.v.–vis), magnetic moment, conductance and thermal studies. The i.r. spectral studies reveal the ligational diversity
of the PPCAQ towards different metal ions as NNN donor in cobalt(II), copper(II), zinc(II) and cadmium(II) complexes and as
ONN donor in manganese(II) and nickel(II) complexes. The antimicrobial activity of all the compounds was tested; copper(II),
zinc(II) and cadmium(II) complexes show enhanced antibacterial activity compared to the free ligand. |
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