The interaction between [Pt(µ-Cl)(Safrole-1H)]2 and 1,3-diisopropylbenzimidazolium bromide in the presence of Ag2O

Authors

  • Nguyen Thi Mai Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Ha Noi, Viet Nam
  • Pham Thi Minh Thao Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Ha Noi, Viet Nam
  • Nguyen Thi Thanh Chi Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/58/6/15245

Keywords:

Pt(II) complex, safrole, 1, 3-diisopropylbenzimidazol-2-ylidene, XRD, 1H NMR spectra.

Abstract

The interaction of the dimeric complex [Pt(µ-Cl)(Saf)]2 (1) (Saf: deprotonated safrole) with the salt iPr2-bimy·HBr in the presence of Ag2O in acetone solvent was studied. The obtained products were mixed complexes of [PtCl(Saf)(iPr2-bimy)] (2) and [PtBr(Saf)(iPr2-bimy)] (3) with different molar ratio (PI, PII, PIII)  depended on the used molar ratio of 1:salt:Ag2O. In the case of this ratio being 1:2:1.1, the mixture PI with 75% for the complex 2 was obtained. When concentration of the salt was increased, the product was PIIwith the molar ratio of 2 : 3 of 1 : 3. However, when both the salt and Ag2O were increased at the same time, 2 and 3 in PIII had equal molar proportions. The two main factors affecting the 2 : 3 molar ratio are the different solubility of AgCl and AgBr and the different coordinating ability of Cl- and Br- ligands. The structure of 2 and 3 was determined by 1H NMR spectra and single crystal X-ray diffraction. The results reveal that Saf in 2 and 3 coordinates with Pt(II) via C=Colefinic and C5 of benzene ring. Meanwhile, iPr2-bimy coordinates with Pt(II) through CNCN and is in trans-position compared with the C=Colefinic bond.

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Author Biography

Nguyen Thi Thanh Chi, Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Ha Noi, Viet Nam

Assoc. Prof. Nguyen Thi Thanh Chi

Head of Department of Inorganic Chemistry, HNUE

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Published

2020-12-15

How to Cite

[1]
N. T. Mai, P. T. M. Thao, and N. T. T. Chi, “The interaction between [Pt(µ-Cl)(Safrole-1H)]2 and 1,3-diisopropylbenzimidazolium bromide in the presence of Ag2O”, Vietnam J. Sci. Technol., vol. 58, no. 6, pp. 728–735, Dec. 2020.

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Section

Materials