4.7 Article

Factors Affecting the Stability of Platinum(II) Complexes with 1,2,4-Triazolo[1,5-a]pyrimidine Derivatives and Tetrahydrothiophene-1-Oxide or Diphenyl Sulfoxide

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MDPI
DOI: 10.3390/ijms23073656

关键词

platinum(II) complex; triazolopyrimidine; NMR; DFT; cis-; trans isomers

资金

  1. Nicolaus Copernicus University in Torun (Excellence Initiative-Research University)

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This article investigates the structure-spectra relationships and stability factors of platinum(II) complexes using experimental data and density functional theory calculations.
The platinum(II) complexes of general formula [PtCl2(dstp)(S-donor)] were dstp 5,7-dimethyl-1,2,4-triazolo[1,5-a]-pyrimidine (dmtp), 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine (dbtp), 5-methyl-7-isobutyl-1,2,4-triazolo[1,5-a]pyrimidine (ibmtp) or 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine (dptp), whereas S-tetrahydrothio-phene-1-oxide (TMSO) or diphenyl sulfoxide (DPSO) were synthesized in a one-pot reaction. Here, we present experimental data (H-1, C-13, N-15, Pt-195 NMR, IR, X-ray) combined with density functional theory (DFT) computations to support and characterize structure-spectra relationships and determine the geometry of dichloride platinum(II) complexes with selected triazolopyrimidines and sulfoxides. Based on the experimental and theoretical data, factors affecting the stability of platinum(II) complexes have been determined.

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