A bis(arylphosphinito)amide pincer ligand that binds nickel forming six-membered metallacycles

A bis(arylphosphinito)amide pincer ligand that binds nickel forming six-membered metallacycles
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一种双(芳基亚膦基)酰胺钳配体,可结合镍形成六元金属环

DOI:
10.1016/j.poly.2020.114380
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发表时间:
2020
期刊:
影响因子:
2.6
通讯作者:
Miller, Alexander J.M.
Miller, Alexander J.M.
中科院分区:
化学3区
文献类型:
--
作者:
Bruch, Quinton J.;Miller, Alexander J.M.

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报道了一种双(芳基膦基)酰胺钳形配体P2 ONO −的合成,该配体设计成在次甲基上形成两个六元环。已知的双(酚基)酰胺ONO 3 −支架的磷酸化导致两种异构体的分离:具有胺部分的预期H(P2 ONO)预配体作为动力学产物形成,其通过胺N-H与磷的净氧化加成异构化,产生含苯并氧氮杂磷杂环戊二烯的热力学产物。这两种异构体都与NiBr 2(二甲氧基乙烷)进行生产性的代谢,产生相同的络合物(P2 ONO)NiBr。用三乙基硼氢化物处理得到末端氢化物络合物(P2 ONO)NiH。溴化物和氢化物复合物使得能够将P2 ONO −配体的空间和电子性质与其他基于酰胺的钳子进行比较。
The synthesis of a bis(arylphosphinito)amide pincer ligand P2ONO−designed to form two six-membered rings upon metallation is reported. Phosphination of a known bis(phenolato)amide ONO3−scaffold led to isolation of two isomers: the intended H(P2ONO) preligand with an amine moiety is formed as a kinetic product, which isomerizes via net oxidative addition of the amine N−H to phosphorous to yield a benzoxazaphosphole-containing thermodynamic product. Both isomers undergo productive metallation with NiBr2(dimethoxyethane) to produce the same complex, (P2ONO)NiBr. Treatment with triethylborohydride furnished the terminal hydride complex (P2ONO)NiH. The bromide and hydride complexes enabled comparisons of the steric and electronic properties of the P2ONO−ligand with other amide-based pincers.
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