High valent transition metal chemistry. Synthesis and characterization of an intermediate-spin iron (IV) complex of a strong. pi.-acid ligand
TJ Collins, BG Fox, ZG Hu, KL Kostka… - Journal of the …, 1992 - ACS Publications
Iron (IV) through iron (VIII) compounds have rarely or never been encountered, 2 partly
because mostexisting ligands are sen-sitive to oxidative degradation. 3 Iterative
identification and replacement of oxidatively sensitive ligand groups is a viable approach for
building oxidation-resistant ligand systems. 36 The so-constructed tetraanion36 [i? 4-l]
4"(Scheme I) and related macrocycles38 stabilize both highly oxidizing38 and high valent
middle and later transition metal (MLTM) complexes with hard anionic axial donors, eg, O2" …
because mostexisting ligands are sen-sitive to oxidative degradation. 3 Iterative
identification and replacement of oxidatively sensitive ligand groups is a viable approach for
building oxidation-resistant ligand systems. 36 The so-constructed tetraanion36 [i? 4-l]
4"(Scheme I) and related macrocycles38 stabilize both highly oxidizing38 and high valent
middle and later transition metal (MLTM) complexes with hard anionic axial donors, eg, O2" …
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