1,3-Butanedione, 1-phenyl , complex

Fig. 32.17 Mono-hydrogenation of 1 -phenyl-1,3-butanedione catalyzed by a BINAP-Ru complex.

The template condensation of a-diketones with 1,3-propanediamine in the presence of divalent iron, cobalt, nickel, or copper leads to 14-membered-ring macrocyclic complexes containing two a-diimines. A number of complexes of this class, derived from 2,3-butanedione,1-3 1-phenyl-1,2-propanedione,4,5 benzil,6 and substituted benzils,5 have been prepared. Preparation of the Ni(II)... 

PBD-Modified LiNbOs Precursor. Non-modified LiNbOs (STD-LiNbOs) precursor solutions are prepared from LiOEt and Nb(OEt)s in ethanol (Hirano, 2002). The structure of the precursor was confirmed to consist of a complex alkoxide Li[Nb(OEt)6], which was reported by Eichorst et al. (1990) in detail (Eichorst et al., 1990). On the other hand, three types of/6-diketone compounds are selected based upon the number of benzene rings (phenyl groups) in its stmcture. In this case, the coordination of l-phenyl-1,3-butanedione (PBD) to the LiNbOs precursor is confirmed by UV spectra. The similar coordination is also realized in 2,4-pentanedione (PD)- and 1,3-diphenyl-1,3-propanedione (DPPD)-modified LiNbOs precursors, which was confirmed by UV-spectra. The proposed structures of these d-diketone modified LiNbOs precursors are shown in Figure 17-1. 

PBD (phenyl butanedione), 372 PBD-modified lithium niobate, 377 PBD-modified precursor, 374 PC method. See polymerizable complex method... 

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