The research to find out new derivatives of platinum is more effective in treating cancer has received much attention in recent times. Carboplatin is considered less toxic derivatives, and fewer side effects than cisplatin. But studies on its mechanism of action has not been elucidated. In this study, the interaction between the purine bases adenine with carboplatin and guanine in DNA to be examined in a systematic manner by means of density-functional calculations. Gaussian 09 Software with flighty function (B3LYP) combined the correlation consistent basis (cc-pVTZ for non-metallic and cc-pVTZ-PP for platinum) is used to optimize the structure, survey the thermodynamic parameters, the IR spectrum and the bonding characteristics. Calculation results show that electrostatic interactions on hydrogen bonds play a central role in stabilizing links. The charge is shifted from H atoms to the oxygen atoms of carboplatin when hydrogen bonds are formed.
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