In situ high-pressure 31P{1H} NMR studies of the hydroformylation of 1-hexene by RhH (CO)(PPh3)3

被引：69

作者：

Bianchini, C ^{[1
]}

Lee, HM ^{[1
]}

Meli, A ^{[1
]}

Vizza, F ^{[1
]}

机构：

[1] CNR, Ist Studio Stereochim & Energet Composti Coor, I-50132 Florence, Italy

来源：

ORGANOMETALLICS | 2000年 / 19卷 / 05期

关键词：

D O I：

10.1021/om9907627

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The hydroformylation of 1-hexene with syngas (40 bar of 1:1 CO/H-2) in the presence of the catalyst precursor RhH(CO)(PPh3)(3) has been studied by high-pressure NMR spectroscopy in a 10 mm sapphire tube equipped with a Ti-alloy valve. Except for RhH(CO)(2)(PPh3)(2), no direct observation of labile intermediates involved in the catalytic cycle has been detected; however as many as four rhodium resting states have been seen, and some factors controlling their formation/interconversion/inhibition have been identified. The information gathered from this in situ investigation is particularly relevant to a better understanding of the inhibiting action of the CO pressure as well as the positive action of PPh3 addition.

引用

页码：849 / 853

页数：5

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