Organo (dipyridyl) nickel complexes. II. Stabilities of olefin-nickel bonds in olefin-cooridinated dipyridylnickel and dialkyl (dipyridyl) nickel complexes
Organo (dipyridyl) nickel complexes. II. Stabilities of olefin-nickel bonds in olefin-cooridinated dipyridylnickel and dialkyl (dipyridyl) nickel complexes
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有机（联吡啶）镍络合物。
DOI：
10.1021/ja00743a010
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发表时间：
1971
影响因子：
15
通讯作者：
S. Ikeda
中科院分区：
文献类型：
--
作者：
Takakazu Yamamoto;A. Yamamoto;S. Ikeda
用光谱法和目视法测定了Ni（dipy）（烯烃）和R2 Ni（dipy）（烯烃）（R= CH 3、C2 H5、n-C3 H7、Z-C4 H9;烯烃=马来酸酐、丙烯酰胺、丙烯腈、甲基丙烯腈、丙烯醛、甲基乙烯基酮、丙烯酸甲酯、甲基丙烯酸甲酯、乙酸乙烯酯）型烯烃-镍配合物的稳定常数。烯烃的电子受体容量而不是电子供体容量是形成稳定的烯烃-镍键的重要因素。R_2Ni（dipy）-（olefin）的烯烃-镍键在低温下的稳定性受烷基的电子效应和空间效应的影响。发现烯烃-镍键的稳定性与R2 Ni（dipy）与烯烃的反应速率之间存在线性关系。
Stability constants of olefin-nickel complexes of the types Ni (dipy)(olefin) and R2Ni (dipy)(olefin)(R= CH3, C2H5,«-C3H7, Z-C4H9; olefin= maleic anhydride, acrylamide, acrylonitrile, methacrylonitrile, acrolein, methyl vinyl ketone, methyl acrylate, methyl methacrylate, vinyl acetate) were determined by spectroscopic and visual methods. The-acceptor capacity rather than-donor capacity of the olefin was found to be an important factor in the formation of a stable olefin-nickel bond. The stability of the olefin-nickel bond of R2Ni (dipy)-(olefin) at low temperature is influenced by electronic and steric effects of the alkyl groups. A linear relation was found between the stabilities of the olefin-nickel bonds and the reaction rates of R2Ni (dipy) with olefins.