A study of the ligand exchange of bromo(o-tolyl)bis(triphenyl-phosphine)nickel(II) with amine by means of 31P- and 13C-NMR spectroscopy.
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概要
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The amine substitution of bromo(<I>o</I>-tolyl)bis(triphenylphosphine)nickel(II) was investigated by the use of <SUP>31</SUP>P- and <SUP>13</SUP>C-NMR. The triphenylphosphine ligands are readily replaced by sterically less crowded amines, such as primary amines, secondary amines, pyridine, and γ-picoline, at room temperature in chlorobenzene, while no replacement at all takes place with tertiary amines. The equilibrium constants with γ-picoline, pyridine, or dibutylamine, as defined by Eq. 2, show that the entropy change contributes predominantly to the constant. The substitution with pyrrolidine, as monitored by means of <SUP>13</SUP>C-NMR, indicates that the amine coordinates to the nickel(II) atom.
- 公益社団法人 日本化学会の論文
著者
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Maruya Ken-ichi
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Nakamura Yoshiyuki
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Mizoroki Tsutomu
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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