Volume 25, Issue 19 p. 4914-4919
Communication

Low-Valent Group 14 NHC-Stabilized Phosphinidenide ate Complexes and NHC-Stabilized K/P-Clusters

Markus Balmer

Markus Balmer

Fachbereich Chemie and Wissenschaftliches Zentrum für, Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032 Marburg, Germany

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Dr. Florian Weigend

Dr. Florian Weigend

Institut für Nanotechnologie, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Leopoldshafen-Eggenstein, Germany

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Prof. Dr. Carsten von Hänisch

Corresponding Author

Prof. Dr. Carsten von Hänisch

Fachbereich Chemie and Wissenschaftliches Zentrum für, Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032 Marburg, Germany

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First published: 19 March 2019
Citations: 13

Graphical Abstract

Carbene-phosphinidenide complexes: New potassium-containing molecular or ionic compounds were obtained starting from the phosphinidenide SIMesPK [SIMes: 1,3-bis-(2,4,6-trimethylphenyl)-imidazolidine-2-ylidene]. For example, recrystallisation of SIMesPK with KOtBu yields the barrel-like cage compound [K6(SIMesP)2(OtBu)4].

Abstract

The N-heterocyclic carbene (NHC)-stabilized phosphinidenide, SIMesPK [SIMes=1,3-bis(2,4,6-trimethylphenyl)imidazolidine-2-ylidene], was used as an (NHC)P-transfer reagent for the synthesis of the low-valent Group 14 ate complexes K[(SIMesP)3E] (E=Ge: 2, Sn: 3, Pb: 4), which were characterized by 1H NMR, 31P NMR, IR spectroscopy as well as elemental and X-ray analysis. Furthermore, SIMesPK was used in reactions with potassium amides and alkoxides to form the molecular phosphorus–potassium clusters [K4(SIMesP)2(hmds)2] [5, hmds=N(SiMe3)2] and [K6(SIMesP)2(OtBu)4] (6). Finally, the reaction of SIMesPK with Li[Al(OC4F9)4] led to the potassium-rich ionic compound [(SIMesP)4K5][Al(OC4F9)4] (7).