Besides, the widening and narrowing of the ester O-P-O bond angle due to distortions caused in the DNA backbone lead to small upfield and downfield shifts, respectively. Purely electrostatic interactions between the drug and the DNA in drug–DNA complexes produce small upfield shifts. The ...
The shape of the thermal ellipsoids of the carboxyl oxygen atoms O1, O2, O6, and O7 is indicative of some rotational movement (vibration) around the (carboxyl)C–C(aryl) bond (yet, no split refinement was suggested by SHELX from the principal mean square atomic displacements). Despite the...