Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Application In Synthesis of Bis(dibenzylideneacetone)palladium. Introducing a new discovery about 32005-36-0, Name is Bis(dibenzylideneacetone)palladium
Monodentate and bridging coordination of 3,3?-annelated 2,2?-bipyridines in zerovalent palladium- and platinum-p-quinone complexes
Compounds of the type M(N?N-kappaN)(nq)2 and M2(mu2-N?N)-(mu2-pbq)2, in which nq = 1,4-naphthoquinone, pbq = 1,4-benzoquinone, and N?N is a monodentate or bridging ligand of the alpha-diimine type, were obtained from reactions of Pd(dba)2 in toluene with the 3,3?-annelated-2,2?-bipyridines: 4,5-diazafluoren-9-one (dafo) and 4,5-diazafluorene (dafe) in the presence of the appropriate p-quinone. In the corresponding reactions with 2,2?-bipyridine (bpy), 1,10-phenanthroline (phen), 2,2?-bipyrimidine (bpym), N,N?-dicyclohexyl-1,4-diaza-1,3-butadiene (chex-dab), bis[N-(o,o?-diisopropyl)phenylimino]acenaphthene (o,o?-iPr2-bian) and 5,6-dihydro-1,10-phenanthroline (dh-phen) only complexes of the type M(N?N-kappa2N)(Q) were formed (Q = nq, pbq). The structures of the complexes have been established by NMR in solution and by X-ray diffraction in the solid state; crystal structures of Pd(bpy-kappa2N)(eta2-pbq) (1) Pd(dafo-kappaN)(eta2-nq)2 (14) and Pd2(mu2-dafo)(mu2,eta 2:eta2-pbq)2 (16) have been determined. Of the ligands, dafo and dafe are the only ones apt to form complexes containing a monodentate or bridging N?N ligand. This behaviour is ascribed to the geometrical constraints of dafo and dafe; the annelation by one carbon atom at the 3,3?-positions in these ligands causes an increase in bite angle from approximately 77 to 82.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Application In Synthesis of Bis(dibenzylideneacetone)palladium, you can also check out more blogs about32005-36-0
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method