“…The first crystallographic report on a transition metal hydroquinone appeared in 1982 (Heistand, et al, 1982 (Evans, et al, 1998), or Fe III (5,10,15,20-tetraphenylporphyrinato) + (45) (Rheingold & Miller, 2003), or Ti IV Cl(CP * ) 2 + (38) (Kunzel, et al, 1996), or Ti III (CP * ) 2 (37) (Horacek, et al, 2010) (Stobie, et al, 2003) or Mo V OCl[hydrogen tris(3,5-dimethylpyrazolyl)borate] + (41) (Ung, et al, 1996). The last two moieties present additional interest because they form trinuclear complexes with two hydroquinones bridging three of these groups in an open structure (46) (Ung, et al, 1999) or three hydroquinones bridging three groups in a close triangular structure (42) (35) (McQuillan, et al, 1998;McQuillan, et al, 1996) (Figure 5).…”