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The formation of ethynyl stannanes X n Sn(C ≡ C-H) 4-n  (X = Cl, Br; n - 0-3) via exchange reactions between tri-n-butvl ethynyl stannane and SnX 4  is readily monitored by  119 Sn NMR spectroscopy. Advantages of  119 Sn NMR as compared with  1 H or  13 C NMR are discussed. The  119 Sn and  13 C NMR parameters (δ 119 Sn, δ 13 C,  1,2 J ( 119 Sn 13 C),  1,2 J ( 13 C 1 H) ) for these reaction mixtures are reported. Tri-n-butyl ethynyl stannane and bis(tri-n-butylstannyl) ethyne are both obtained from the reaction of tri-n-butylstannylchloride with Li 2 C 2  in hexane in the presence of excess ethyne

zeitschrift für naturforschung b

Austauschreaktionen von Tri-n -butylethinylstannan mit Zinntetrachlorid und Zinntetrabromid - Anwendung der  119 Sn-NMR Spektroskopie / Exchange Reactions between Tri-n-butyl Ethynyl Stannane and Tintetrachloride and Tintetrabromide - Application of  119 Sn NMR Spectroscopy