| Abstrakt: |
The ortho-metalated complex [Pd(x){ κ( C, N)-[CHCHNRR′ (Y)}] ( 2a- 4a and 2b- 3b) was prepared by refluxing in benzene equimolecular amounts of Pd(OAc) and secondary benzylamine [ a, EtNHCHPh; b, t-BuNHCHPh followed by addition of excess NaCl. The reaction of the complexes [Pd(x){ κ( C, N)-[CHCHNRR′ (Y)}] ( 2a- 4a and 2b- 3b) with a stoichiometric amount of PhP=C(H)COCH-4-Z (Z = Br, Ph) (ZBPPY) (1:1 molar ratio), in THF at low temperature, gives the cationic derivatives [Pd(OC(Z-4-CHC=CHPPh){ κ( C, N)-[CHCHNRR′(Y)}] ( 5a- 9a, 4b- 6b, and 4b′- 6b′), in which the ylide ligand is O-coordinated to the Pd(II) center and trans to the ortho-metalated C(6)H(4) group, in an 'end-on carbonyl'. Ortho-metallation, ylide O-coordination, and C-coordination in complexes ( 5a- 9a, 4b- 6b, and 4b′- 6b′) were characterized by elemental analysis as well as various spectroscopic techniques. [ABSTRACT FROM AUTHOR] |
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