The Instability of Ni{N(SiMe3)2}2: A Fifty Year Old Transition Metal Silylamide Mystery

The characterization of the unstable NiII bis(silylamide) Ni{N(SiMe3)2}2 (1), its THF complex Ni{N(SiMe3)2}2(THF) (2), and the stable bis(pyridine) derivative trans‐Ni{N(SiMe3)2}2(py)2 (3), is described. Both 1 and 2 decompose at ca. 25 °C to a tetrameric NiI species, [Ni{N(SiMe3)2}]4 (4), also obta...

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Published inAngewandte Chemie Vol. 127; no. 44; pp. 13106 - 13109
Main Authors Faust, Michelle, Bryan, Aimee M., Mansikkamäki, Akseli, Vasko, Petra, Olmstead, Marilyn M., Tuononen, Heikki M., Grandjean, Fernande, Long, Gary J., Power, Philip P.
Format Journal Article
LanguageEnglish
German
Published Weinheim WILEY-VCH Verlag 26.10.2015
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
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Summary:The characterization of the unstable NiII bis(silylamide) Ni{N(SiMe3)2}2 (1), its THF complex Ni{N(SiMe3)2}2(THF) (2), and the stable bis(pyridine) derivative trans‐Ni{N(SiMe3)2}2(py)2 (3), is described. Both 1 and 2 decompose at ca. 25 °C to a tetrameric NiI species, [Ni{N(SiMe3)2}]4 (4), also obtainable from LiN(SiMe3)2 and NiCl2(DME). Experimental and computational data indicate that the instability of 1 is likely due to ease of reduction of NiII to NiI and the stabilization of 4 through dispersion forces. Die Instabilität von Ni{N(SiMe3)2}2, einem der ursprünglichen Übergangsmetallsilylamide von Bürger und Wannagat, wurde nochmals unter die Lupe genommen: Offenbar findet eine Autoreduktion zum dispersionskraftstabilisierten NiI‐Tetramer [Ni{N(SiMe3)2}]4 statt, dem ersten neutralen homoleptischen NiI‐Amid (siehe Bild; hellblau Si, dunkelblau N, grün Ni).
Bibliography:National Science Foundation - No. CHE-1263760
istex:31A9271691ED8A7EA5CC016A2C26FD43B306F8E2
ark:/67375/WNG-1XQ42V5Q-2
ArticleID:ANGE201505518
Academy of Finland - No. 136929; No. 253907; No. 272900
NSF - No. DGE-1148897
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201505518