Oxidative Adthtion Reaction - Redistribution Reaction - Chemistry Assignment Help

Assignment Task :

Questions 1. Wri.g a balanced equation for the formation of (Cell,CH2)3SnC1 from CelisCH2C1 and . metal is not straightforward. The reaction most likely proceeds by an oxidative adthtion reaction to fonn (C.CH2)2SnC12 folio... by a redistribution reaction. Write equations for these protases.

a. suggest a possible reason why it is (C6HsCH2)3SnC1 that is isolated from the reaction n..e.

2. Comment on possible reasons thr the low yields typically observed for . reaction.

3. Interpret and analyse the NMR spec.. (Reference 3 is a text containing background information on NI. spectroscopy). It is possible to completely assign all the peaks in each spectrum. Annotate the spectra and attach them in your notebook. Comment on how coupling between 111..0 and "Sn or I.Sn nuclei give rise to the splitting pattems obsened in the spectra. How do these patterns relate to the isotopic abtmdance death element,

4. Identify the coupling 1.7(.9.-13C) in both the I3C and .19Sn spectra of (C6115.1.2)3Sn(S2CNEt). and show that the coupling constant has the same value. ). Comment on structure of (C.CH2)3SnCl. Mat is the geometry at the . centre, How do the NMR spectra confirm .s?

5. Identify the ....ornate ligmd bands in the IR spectrum of (CsHsCH2)3Sn(S2CNEt, by comparison with the IR spectrum of (CEHICH2)3SnCl.

6. After considering the crystal structure and relevant bond lengths. comment on the coordination mode for the th.ocarbamate ligand in (C.CH2)3Sn(S2CNEt2).

7. tin-carbon bond lengths in (C.CF.S.1 are 2.151 A. Compare these to the corresponding bond leg. m (C6H5CH2)3Sn(S2CNEt2),

a. comment on the effect of coordination number on avernge bond lengths.

8. Do the benzyl groups in the crystal stucture of (C6115CH2)3Sn(S,CNEt2) axupy equivalent positions, Why do the benzyl groups in the NMR spectra of (CsHsCH,3Sn(S2CNEt2) all appear to be chemically equivalent? 

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