Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain the 2,6-Bis(2,4,6-triisopropylphenyl)phenylimido (NHIPT) Ligand

被引：16

作者：

Axtell, Jonathan C. ^{[1
]}

Schrock, Richard R. ^{[1
]}

Mueller, Peter ^{[1
]}

Hoveyda, Amir H. ^{[2
]}

机构：

[1] MIT, Dept Chem 6 331, Cambridge, MA 02139 USA

[2] Boston Coll, Dept Chem, Merkert Chem Ctr, Chestnut Hill, MA 02467 USA

来源：

ORGANOMETALLICS | 2015年 / 34卷 / 11期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

OPENING METATHESIS POLYMERIZATION; SELECTIVE CROSS-METATHESIS; IMIDO ALKYLIDENE; DFT CALCULATIONS; AROMATIC RING; MO; CATALYSTS; HYDRIDE; SILYL; REACTIVITY;

D O I：

10.1021/om501213x

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Molybdenum and tungsten alkylidene complexes that contain the sterically demanding hexaisopropylterphenylimido ligand, N-2,6-(2,4,6-i-Pr3C6H2)(2)C6H3 (NHIPT), have been prepared from Mo(N-t-Bu)(2)Cl-2(1,2-dimethoxyethane) or W(N-t-Bu)(2)Cl-2(pyridine)(2), employing tert-butylimido ligands as sacrificial proton acceptors. These complexes include M(NHIPT)(CH-t-Bu)Cl-2 (M = Mo, W), Mo(NHIPT)(CH-t-Bu)(pyrrolide)(2), and Mo(NHIPT)(CH-t-Bu)(pyrrolide)(OC6F5)(CH3CN). In all cases only anti alkylidene isomers are observed in solution, as a consequence of the steric demands of the NHIPT ligand. An X-ray structure of W(NHIPT)(CH-t-Bu)Cl-2 showed it to be a monomer with a disordered alkylidene that is 86% in the anti configuration and 14% in the syn configuration.

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页码：2110 / 2113

页数：4

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