Polycyclic aromatic ligands

H. Tanaka, S. Tokito, Y. Taga, and A. Okada, Novel metal-chelate emitting materials based on polycyclic aromatic ligands for electroluminescent devices, J. Mater. Chem., 8 1999-2003 (1998). 

Four consecutive C = C units embedded in polycyclic aromatic ligand (PAL) is demonstrated to stabilize a Pd4 chain. The Pd-Pd-Pd-Pd chain is sandwiched by two perylene ligands (Scheme 47) in coordination... 

Nitrosonium complexes 20a-d of l-R-2-methylacenaphthylenes 21a-d (Scheme 15) can be considered as complexes with two-electron ligands, as unlike complexes of other polycyclic aromatic compounds (8, 52), nitrosonium... 

Fig. 5 Typical deformations detected in 96 hpf zebrafish embryos exposed at the indicated concentrations of the carcinogenic polycyclic aromatic hydrocarbons Benzo[a]Pyrene (b) and Benazo [k]Fluoranthene (c), or to the reportedly nontoxic AhR-ligand (3-naphthofiavone (d). A nonexposed, normal specimen is shown in (a). Arrows indicate (a) pericardial edema, (b) malformation of the lower jaw, (c) malformation of the tail, (tf) color of the yolk, and (e) coagulation...

Figure 34 Cross-linking of Ni(p,-SCN)2L2 n coordination polymer via carboxyl-carboxyl hydrogen bonds between isonicotinic acid ligands (L) to give a sheet structure which stacks providing channels that can accommodate polycyclic aromatic hydrocarbon guest molecules, here anthracene [80], Oxygen, nitrogen and key hydrogen atoms are shaded nickel thiocyanate polymer and anthracene guest molecules shown in wireframe style.

With nickel(II) 2-ethylhexanoate and triethylaluminum, tetralin (59) is obtained by hydrogenation of naphthalene (55). Polycyclic aromatics, such as anthracene (57 equation 8), 9-methylanthracene and 9-trifluoroacetylanthracene, are partially hydrogenated to 1,2,3,4-tetrahydroanthracene derivatives by use of [Rh(DPPE)(arene)]+ in methanol and by ruthenium hydride complexes having triphenylphosphine ligands... 

Reactions are achieved with benzene and its derivatives (including those deactivated for electrophilic attack), polycyclic aromatics, heteroaromatics and transition-metal complexes of aromatic ligands. 

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