Synthesis of Tin (IV) Heteroaryl Alkenols and Their Susceptibility Towards Fluorination

Podhorsky J.^1, Moravec Z.^1, Pinkas J.^1, Hegemann C.^2 and Mathur S.^2*

1 – Department of Chemistry, Masaryk University, Kotlarska 2,611 37 Brno, Czech Republic

2 – Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 509 37 Cologne,
Germany


In our work, we focused on reactions of organometallic tin (IV) precursors, such as Sn(O^tBu)[4],
Me[3]SnCl, and Me[3]SnF, with β-heteroarylalketonates: 3,3,3-trifluoro(pyridin-2-yl)propen-2-ol,
3,3,3-trifluoro(dimethyl-1,3-oxazol-2-yl)propen-2-ol, and
3,3,3-trifluoro(1,3-benzthiazol-2-yl)propen-2-ol [1]. Obtained compounds were exposed to various
fluorination agents (HF, XeF[2], and NH[4]F) and their reactivity towards them was compared to
already published Sn (II) β-heteroarylalketonates [2-3]. Subseqent CVD experiments made by partner
institution (Murauskas, Abrutis, University of Vilnius) have proved that our Sn (IV)
β-heteroarylalketonates are suitable precursors for transparent SnO[2] thin films used in
optoelectronics.


             Figure 1 Transparency of SnO[2] prepared by deposition at 650 °C of PODA
          (Sn(O^tBu)[2](2-pyCHCOCF[3])[2]) and POD B (Sn(O^tBu)[2](4,5-meOxCHCOCF[3])[2])


References:

[1] M. Kawase, M. Teshima, S. Saito, S. Tani, Heterocycles, 1998, 48, 2103.

[2] I. Giebelhaus, R. Müller, W. Tyrra, I. Pantenburg, T. Fischer, S. Mathur, Inorg. Chim. Acta,
2011, 372, 340.

[3] T. Heidemann, S. Mathur, Eur. J. Inorg. Chem., 2014, 506.