A zwitterionic palladium(II) η3-boratoxypentadienyl complex: Cooperative activation of dibenzylideneacetone between palladium and a phosphine/thioether/borane ligand

Organometallics

Volumn 25, Issue 10, 2006, Pages 2412-2414

  Emslie, David J H ^a   Blackwell, James M ^a   Britten, James F ^a   Harrington, Laura E ^a  

^a MCMASTER UNIVERSITY   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

COMPLEXATION; ETHERS; IONS; ORGANOMETALLICS; PHASE TRANSITIONS; REACTION KINETICS; TRANSITION METALS;

BORANE LIGANDS; BORATOXYPENTADIENYL COMPLEXES; EMPIRICAL FORMULA; LEWIS ACIDIC BORANE;

PALLADIUM COMPOUNDS;

EID: 33744492115     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om0602052     Document Type: Article

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46. 2, crystals of [Pd(dba)(5)] with a different amount of (disordered) solvent were also formed and investigated by X-ray crystallography. The structures of the [Pd(dba)(S)] core are to all intents and purposes identical in both crystals.
47. -1, minimum transmission 0.719, maximum transmission 0.938, 703 parameters, final R indices (1> 2σ(I)) Rl = 0.0522, wR2 = 0.1209, GOF = 1.029, residual electron density 0.098 (rms). Crystallographic data (excluding structure factors) for the structure reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as Supplementary Publication No. CCDC-290380. Copies of the data can be obtained free of charge on application to the CCDC, 12 Union Road, Cambridge CB2 1EZ, U.K. (fax, (+44)1223-336-033; e-mail, deposit@ccdc.cam.ac.uk).
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49. The increased ability of dba (R = CH=CHPh versus R = Me, H) to stabilize the positive charge generated on the carbonyl carbon upon Lewis acid coordination (cf. IR ν(CO) for free RC(O)H > RC(O)Me > RC(O)CH=CHPh) will render dba more difficult to activate toward the palladium(II) boratoxyallyl extreme than trans-benzylideneacetone or transcinnamaldehyde.