Spacer flexibility in bis(pyridyl) ligands: chelating organosilicon pyridylethynyl ligands.
Two new bis(pyridylethynyl) ligands with organosilicon spacers have been synthesized. The ligands react readily with silver(I) to form crystalline complexes, both of which are revealed to be triflate-bridged dimers by X-ray crystallographic analysis. The complex with the flexible siloxane-based ligand possesses considerably less bond angle distortion.
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