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Decomposition of Ethoxyethynyl(trimethyl)tin – Studied by

119

Sn and

13

C NMR Spectroscopy

Bernd Wrackmeyer

a;

and Sergei V. Ponomarev

b

aLaboratorium f¨ur Anorganische Chemie, Universit¨at Bayreuth, D-95440 Bayreuth, Germany

bDepartment of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, 119899 Moscow, Russia

* Reprint requests to Prof. Dr. B. Wrackmeyer. Fax: +49 921 552157.

E-mail: B.Wrack@uni-bayreuth.de

Z. Naturforsch.54 b,705–708 (1999); received February 23, 1999 Alkynes, Ketenes, Tin, NMR Data

The thermally induced decomposition of ethoxyethynyl(trimethyl)tin (1) was studied by

119Sn NMR which revealed the formation of bis(trimethylstannyl) ketene (2) as the major product, bis(trimethylstannyl) acetic acid ethyl ester (3) as a minor product, and a small amount of tetramethyltin (4). Full NMR data sets, including coupling constants and isotope induced chemical shifts112=13C(119Sn) are provided for1-3. The first example of ultra-high resolution

119Sn NMR is shown.

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