Hybrid tetradentate ligands

Sensitizers Containing Functionalized Hybrid Tetradentate Ligands 733... 

Fig. 8.5 Hybrid tetradentate ligands and pK, values for LZn-OHj complexes. Reprinted with permission from [35]. Copyright (2003) American Chemical Society.

Aluminum—tetradentate ligand catalyst system, in epoxide homopolymerization, 11, 601 Aluminum(I) tetrahedra, synthesis, 9, 262 Aluminum(III)-tin exchange, process, 9, 265 Aluminum-transition metal bonds, characteristics, 9, 264 Amavadine, for alkane carboxylations, 10, 234—235 Ambruticin S, via ring-closing diene metathesis, 11, 218 Amide-allenes, cyclizations, 10, 718 Amide ether complexes, with Zr(IV) and Hf(IV), 4, 783 Amide hybrid ligands, in organometallic synthesis, 1, 64 Amides... 

Ruthenium complexes [RuCl2(PNNP)] containing tetradentate hybrid ligands 7.53 with P-and N-donors (PNNP) catalyze the asymmetric epoxidation of unfunctionalized alkenes... 

The synthetic routes to the limited number of tri- and tetra-dentate ligands containing selenium, which, with the exception of an open chain tetraselenoether, are of the hybrid type incorporating nitrogen or phosphorus donors, have been recently reviewed. The tetradentate selenoether, bsep, has been shown to react with Na2PdX4 (X = Cl, Br or I) to give Pd2(bsep)X4 which, on the basis of IR spectroscopy, have been formulated as selenium-bridged dimers (4). 

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