3,5-Di-tert-butyl-1,2-benzoquinone

Platinum(ii) complexes of mixed-valent radicals derived from cyclotricatechylene, a macrocyclic tris-dioxolene

“…S22 † ), with the average C–C distance intermediate between those typical for closed-shell catecholates and quinones. 56 , 57 Calculated structures of the complexed ligands in [4˙] + and [5˙] + are similar (Table S4 † ), with slightly longer average C–O ( ca. 1.30 Å) and shorter average C–C(ring) (1.41 Å) distances than free [DBsq˙] – (1.26 and 1.43 Å, respectively).…”

Ligand‐Centered Radical Activity by a Zinc‐Schiff‐Base Complex towards Catechol Oxidation

“…Selected bond angles and bond distances of 2 are given in Table S2. Literature survey on the crystal structure of 3,5‐DTBQ indicates that Wen et al , isolated this compound in the form of a single crystal. Most interestingly, C−O bond distances are found in the quinone unit [C2‐O1, 1.216 Å; C1‐O2, 1.230 Å] while C−O distances are seen as C15‐O3, 1.371 Å; C16‐O4, 1.384 Å; C29‐O5, 1.371 Å, C30‐O6, 1.382 Åin two asymmetric catechol units.…”

The Influence of Nucleophilic and Redox Pincer Character as well as Alkali Metals on the Capture of Oxygen Substrates: The Case of Chromium(II)

“…The C-O distances range from 1.331( 7) to 1.366(7) Å and are elongated compared to the C-O distance in DTBQ, 1.214(3) and 1.217(3) Å; [17a, 17c] the catecholate C-C bond lengths, 1.413(8) and 1.412(9) Å, are contracted compared to the same C-C bond in DTBQ, 1.544(4) Å. [18] Taken together (Figure S10), the C-O and C-C distances are fully consistent with catecholate electronic structure.…”