Tin Compounds with Coordination Numbers Four to Six

The study on Cd complexes surveyed in the preceding section was based on only four crystal structures [2]. Eight years later, Britton and Dunitz [5] published an analogous study on tin complexes. Their work was based on systematic searches in the Cambridge Structural Database (CSD [6] and Chapter 3). It could rely on a much larger and broader selection of structural data (186 entries, 250 examples of Sn(IV) atoms). 

For this fragment two limiting situations have been analyzed one in which the electronegative X and Y substituents are arranged trans to each other and another in which X and Y are arranged in cis positions. 

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