The Nitrogen‐Assisted Triphenylphosphine Displacement of 3‐Hydroxypyridine and 3‐Aminopyridine Ligands in Palladium(II) Complexes: Crystal Structures of [Pd(PPh3)Br]2{μ,η2‐C5H3N(OH)}2 and [Pd(PPh3)Br]2{μ,η2‐C5H3N(NH2)}2 |
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| Authors: | Kuang‐Hway Yih Hsiao‐Fen Wang Keh‐Feng Huang Chang‐Chi Kwan Gene‐Hsiang Lee |
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| Affiliation: | 1. Department of Applied Cosmetology, Hungkuang University Shalu, Taichung 433, Taiwan, R.O.C.;2. Department of Applied Cosmetology, Providence University Shalu, Taichung 433, Taiwan, R.O.C.;3. Instrumentation Center, College of Science, National Taiwan University, Taipei 106, Taiwan, R.O.C. |
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| Abstract: | Treatment of Pd(PPh3)4 with 2‐bromo‐3‐hydroxypyridine [C5H3N(OH)Br] and 3‐amino‐2‐bromopyridine [C5H3N(NH2)Br] in dichloromethane at ambient temperature cause the oxidative addition reaction to produce the palladium complex [Pd(PPh3)2{η1‐C5H3N(OH)}(Br)], 2 and [Pd(PPh3)2{η1‐C5H3N(NH2)}(Br)], 3 , by substituting two triphenylphosphine ligands, respectively. In dichloromethane solution of complexes 2 and 3 at ambient temperature for 3 days, it undergo displacement of the triphenylphosphine ligand to form the dipalladium complexes [Pd(PPh3)Br]2{μ,η2‐C5H3N(OH)}2, 4 and [Pd(PPh3)Br]2{μ,η2‐C5H3N(NH2)}2, 5 , in which the two 3‐hydroxypyridine and 3‐aminopyridine ligands coordinated through carbon to one metal center and bridging the other metal through nitrogen atom, respectively. Complexes 4 and 5 are characterized by X‐ray diffraction analyses. |
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| Keywords: | 2‐Bromo‐3‐hydroxypyridine 3‐Amino‐2‐bromopyridine Palladium Dipalladium Nitrogen‐assisted X‐ray diffraction |
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