Discovery of 32005-36-0

32005-36-0, Name is Bis(dibenzylideneacetone)palladium, belongs to catalyst-palladium compound, is a common compound. Formula: C34H28O2PdIn an article, once mentioned the new application about 32005-36-0.

Syntheses of Vinylidene-bridged A-Frame Palladium Complexes containing Ph2PCH2PPh2 or Ph2PCHMePPh2: Protonation to Give Carbyne-bridged Complexes

Treatment of benzene solutions of (dba=dibenzylideneacetone) or with Ph2PCH2PPh2 (dppm) and X2C=CH2 (X=Cl or Br) gave the ‘A-frame’ vinylidene-bridged complexes of type in high yield.Treatment of (1a) with LiBr, NaI, or KSCN in acetone gave , respectively.Complex (1a) with TlO2CMe gave <(MeCO2)Pd-(mu-dppm)2(mu-C=CH2)Pd(O2CMe)> (1e) and with LiC<*>CC6H4Me-4 the diacetylide complex <(p-MeC6H4C<*>C)Pd(mu-dppm)2(mu-C=CH2)Pd(C<*>CC6H4Me-p)> (2a) was obtained in low yield.Better yields of the diacetylides of type <(RC<*>C)Pd(mu-dppm)2(mu-C=CH2)Pd(C<*>CR)> were obtained by treating (1a) with HC<*>CR, TlPF6, and NEt3 in dichloromethane; e.g. with R=C6H4Me-4 (2a), Ph (2b), or CMe2(OH) (2c).Treatment of (1a) with p-MeC6H4NC and NaBPh4 in ethanol gave <(p-MeC6H4NC)Pd(mu-dppm)2(mu-C=CH2)Pd(CNC6H4Me-p)>2 (3).Treatment of with dppm and Cl2C=CCl2 gave a mixture of (4) and but (4) was obtained in high yield and purity when a mixture of , dppm, and was heated.A mixture of and Ph2PCHMePPh2 (mdppm) when treated with Cl2C=CH2 gave the ‘A-frame vinylidene-bridged complex (5a) or (5b).Treatment of (1a) or (5a)/(5b) with HBF4*Et2O or CF3CO2H gave (1+) , characterized in solution by n.m.r. spectroscopy.Salts of these carbyne cations were not isolated pure.N.m.r. data are given and discussed.

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Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method