Reactivity of bis(long chain substituted β-diketonato)palladium(II) [Pd(OOR2)2] towards HBF4: formation of luminescent [BF2(OOR2)] derivatives. X-ray structure of [1,3-di(4-n-butoxyphenyl)propane-1,3-dionato]difluoroboron(III)
作者:M.J. Mayoral、M. Cano、J.A. Campo、J.V. Heras、E. Pinilla、M.R. Torres
DOI:10.1016/j.inoche.2004.06.011
日期:2004.8
Reactions of [Pd(OOR2)(2)] (OOR2 = 1,3-di(4-n-alkyloxyphenyl)propane-1,3-dionato; R = C6H4OCnH2n+1, n = 14, 16, 4) with N,N'-bidentate ligands of the type bis(4-n-alkyloxyphenyl)-1-(pyridin-2-yl)-1H-pyrazoI (pypz(R2)) in the presence of HBF4 gave rise to new dioxoborane derivatives [BF2(OOR2)](1-3) as major products. Compounds 1-3 were also isolated by reaction of [Pd(OOR2)(2)] and HBF4, as well as by reaction of the corresponding beta-diketones or sodium beta-diketonates with HBF4. The new oxoboranes [BF2(OOR2)] (1-3) showed intense yellow or blue luminescence in the solid state and in the solution, respectively. The X-ray structure of 3 containing the shortest chain (R = C6H4OC4H9) evidenced the chelating coordination of the beta-diketonate ligand to the acceptor BF2 group in a boron tetrahedral environment. The molecules were packed in layers showing weak C-(HF)-F-... bifurcated interactions, which were responsible for a bi-dimensional network. (C) 2004 Elsevier B.V. All rights reserved.