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Figure 21
Atomic radius of the heteroatom bonded to boron (oxygen – blue circle, nitrogen – green square, chlorine – pink triangle, sulfur – red diamond and bromine – purple X) versus the axial bond length. The boron–oxygen bond length is the average axial bond length of compounds 3–13 and the boron–sulfur bond length is the average axial bond length of compounds 14 and 15. |