Application of a “sterically fine-tuned” guanidinate ligand was considered essential to enforce the shortest Cr—Cr bond length known (A. Noor; G. Glatz; R. Müller; M. Kaupp; S. Demeshko; R. Kempe, Z. Anorg.
Allg. Chem., 2009, 635, 1149). Use the sketches in this reference to discuss the steric and electronic features of aminopyridinates, amidinates, and guanidinates that result in varying Cr—Cr bond lengths. How does the magnetic susceptibility measurement for the dichromium complex featured in this reference support an electronic structure consistent with a quintuple bond?
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