期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 13, 页码 4306-4309出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b00830
关键词
-
资金
- University of Pennsylvania
- National Science Foundation [CHE30848248, CHE31152123]
- JSPS [14J11968]
- Grants-in-Aid for Scientific Research [14J11968] Funding Source: KAKEN
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1464659] Funding Source: National Science Foundation
Complex (PNP)Nb(CH3)(2)(OAr) (PNP = N[2-(PPr2)-Pr-i-4-methylphenyl](2)(-), Ar = 2,6-(Pr2C6H3)-Pr-i), prepared from treatment of (PNP)NbCl3 with NaOAr followed by 2 equiv of H3CMgCl, can be oxidized with [FeCp2][OTf] to afford (PNP)Nb(CH3)(2)(OAr)(OTf). While photolysis of the latter resulted in formation of a rare example of a niobium methylidene, (PNP)Nb=CH2(OAr)(OTf), treatment of the dimethyl triflate precursor with the ylide H2CPPh3 produced the mononuclear group 5 methylidyne complex, (PNP)Nb CH(OAr). Adding a Bronsted base to (PNP)Nb=CH2(OAr)(OTf) also resulted in formation of the methylidyne. Solid-state structural analysis confirms both methylidene and methylidyne moieties to be terminal, having very short Nb-C distances of 1.963(2) angstrom and 1.820(2) angstrom, respectively. It is also shown that methylidyne for nitride cross-metathesis between (PNP)Nb CH(OAr) and NCR (R = tert-butyl or 1-adamantyl) results in formation of a neutral and mononuclear niobium nitride, (PNP)Nb N(OAr), along with the terminal alkyne HC CR.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据