Helical racemate architecture based on osmium(II)-polypyridyl complexes: Synthesis and structural characterisation |
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| Authors: | Sanjay Kumar Singh |
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| Institution: | Department of Chemistry, Awadhesh Pratap Singh University, Rewa-486 003 (M.P.), India |
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| Abstract: | New polypyridyl osmium(II) complexes Os(κ3-tptz)(EPh3)2Cl]BF4 (E = P, 1; As, 2) with group 15 donor ligands are reported. Structural studies on the representative complex Os(κ3-tptz)(PPh3)2Cl]BF4 revealed formation of helical racemates with sidewise stacking of right and left-handed anti-parallel helical strands. Salient structural features and DNA binding studies along with binding constant 6.6 × 103 M−1] and site size 0.12] of the complex 1 with calf thymus (ct) DNA by absorption spectroscopy are described. |
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| Keywords: | Osmium(II)-polypyridyl complexes Group 15 donor ligands X-ray Weak interactions DNA binding constant Helical racemates |
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