Silver decoration of a palladacycle through ‘‘spacer–guest’’ interaction
نویسندگان
چکیده
[Pd(dppf)(MeCN)2](OTf)2 [dppf = 1,1 0-bis(diphenylphosphino)ferrocene, OTf = triflate] reacts with pyridyl acetic acid (PyAcOH) to yield a dipalladium ring structure, [Pd2(dppf)2(l-PyOAc)2](OTf)2 (1). The doubly-bridging ligands exhibit basicity at the pendant carboxyl oxygen to attract AgX (X = OTf or CF3CO2) to form [Pd2Ag2(dppf)2(PyOAc)2(OTf)4] (2) and [Pd2Ag2(dppf)2 (PyOAc)2(OTf)2(CF3CO2)2] (3), respectively. Complexes 1 and 2 have been crystallographically characterized. Similar spacer–guest affinity is not found in the Pt(II) or isonicotinate analogues. 2005 Elsevier B.V. All rights reserved.
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