X-ray structure and multinuclear NMR studies of platinum(II) complexes with 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one |
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| Authors: | Iwona ?akomska Andrzej Wojtczak Jerzy Sitkowski Lech Kozerski Edward Sz?yk |
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| Institution: | 1. Department of Chemistry, Nicholas Copernicus University, Gagarina 7, 87-100 Toruń, Poland;2. National Institute of Public Health, Che?mska 30/34, 00-725 Warsaw, Poland;3. Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland |
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| Abstract: | New dichloride platinum(II) complexes with 5-methyl-1,2,4-triazolo1,5-a]pyrimidin-7(4H)-one (HmtpO) have been synthesized and characterized by thermal analysis, infrared and 1H, 13C, 15N, 195Pt NMR spectroscopy. X-ray crystal structures of cis-PtCl2(NH3)(HmtpO) (1) and cis-PtCl2(HmtpO)2 · 4H2O (2b) were determined to R = 0.0332 and R = 0.0802, respectively. In both complexes the Pt(II) ions have a square-planar geometry with two adjacent corners being occupied by two nitrogens of HmtpO molecules for 2b or NH3 and HmtpO molecules for 1, whereas the remaining adjacent corners are occupied by two chloride anions. Spectroscopic data confirm the square planar geometry with N(3) bonded HmtpO, S-bonded dimethylsulfoxide and two trans chloride anions for trans-PtCl2(dmso) · 4H2O (3). |
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| Keywords: | Platinum complex 1 2 4-Triazolo[1 5-a]pyrimidine derivative Dimethylsulfoxide Multinuclear NMR X-ray structure |
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