Volume 58, Issue 33 pp. 11429-11433
Communication

Phosphanyl Cyanophosphide Salts: Versatile PCN Building Blocks

Dr. Zhongshu Li

Dr. Zhongshu Li

Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University, 510275 Guangzhou, China

State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 30071 Tianjin, China

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Dr. Jaap E. Borger

Corresponding Author

Dr. Jaap E. Borger

Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland

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Fabian Müller

Fabian Müller

Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland

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Prof. Dr. Jeffrey R. Harmer

Prof. Dr. Jeffrey R. Harmer

Centre for Advanced Imaging, University of Queensland, Brisbane, QLD, 4072 Australia

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Prof. Dr. Cheng-Yong Su

Prof. Dr. Cheng-Yong Su

Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University, 510275 Guangzhou, China

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Prof. Dr. Hansjörg Grützmacher

Corresponding Author

Prof. Dr. Hansjörg Grützmacher

Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University, 510275 Guangzhou, China

Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland

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First published: 03 June 2019
Citations: 20

Graphical Abstract

A new brick: The oxygen center in the phosphaketenes E-P=C=O can be readily replaced by nitrogen to give alkali salts of phosphanyl cyanophosphides [E-PCN], which are further converted into E2(PCN). These compounds can be used as synthons for the dianion [PCN]2−, which is a building block for PCNB heteroallenes and PCN-containing metal complexes.

Abstract

The facile preparation of alkali salts of phosphanyl cyanophosphides [NHP-PCN] (NHP=N-heterocyclic phosphenium) is reported. Their formation is achieved by isoelectronic replacement of O for [N] in the phosphaketenes NHP-PCO using alkaline hexamethyldisilazide M[N(SiMe3)2] (M=Na, K) as reagent. The new anionic entities are versatile PCN building blocks which allow the formation of a diversity of new cyanophosphine derivates including the first example of a PCNB hetero-cumulene and a PCN-ligated transition metal complex.

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