The geometries present in these N-heterocycle adducts are compared with those in pnictogen oxide and crown ether complexes.
In polymeric chains involving bridging fluorine and pyridine-N-oxide are present, again resulting in a very distorted seven-coordinate geometry at Sb. , also containing seven-coordinate antimony, is produced from SbF 3 and 1,10-phenanthroline in MeOH, but has a six-coordinate antimony centre (pentagonal pyramidal) with no significant intermolecular contacts to neighbouring molecules. was obtained from iPrOH solution, but hydrolysis in solution readily forms. These are linked by longer fluorine contacts, each antimony achieving a distorted seven-coordinate geometry.
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