η3-Propargyl/Allenyl Complexes of Platinum and Palladium of the Type [(PPh3)2M(η3-CH2CCR)]+
Autor: | Andrew Wojcicki, Véronique Plantevin, Patrick W. Blosser, David G. Schimpff, Mark W. Baize, Judith C. Gallucci |
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Rok vydání: | 1996 |
Předmět: | |
Zdroj: | Organometallics. 15:164-173 |
ISSN: | 1520-6041 0276-7333 |
DOI: | 10.1021/om9506678 |
Popis: | A study is reported on the synthesis, spectroscopic properties, molecular structure, and reaction chemistry of η3-propargyl/allenyl complexes of platinum and palladium of the type [(PPh3)2M(η3-CH2CCR)]+ (M = Pt, R = Ph (1a), Me (1b); M = Pd, R = Ph (2a), Me (2b)). Complexes 1a,b were obtained by each of the following methods: (i) reaction of trans-(PPh3)2PtBr(η1-CH2C⋮CPh) with AgO3SCF3; (ii) treatment of (PPh3)2Pt(η2-PhC⋮CCH2OMe) with BF3·OEt2; (iii) addition of RC⋮CCH2OS(O)2C6H4Me-p to (PPh3)2Pt(η2-C2H4) in solution. Complexes 2a,b resulted upon (i) abstraction of Br- from trans-(PPh3)2PdBr(η1-CH2C⋮CR)/trans-(PPh3)2PdBr(η1-C(R)CCH2) with AgBF4 and (ii) treatment of Pd2(dba)3·CHCl3 with PPh3 and RC⋮CCH2OS(O)2C6H4Me-p. The structures of 1a(OTf)·CH2Cl2 (Tf = O2SCF3) and 2a(BF4) were determined by X-ray diffraction techniques. Both cationic metal complexes show remarkably similar structures, the salient features being the attachment to the metal of all three propargyl/allenyl carbon atoms of the nonlinear C... |
Databáze: | OpenAIRE |
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