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Reaction of the 1,2-disilylenes {( DipAr Am)Si} 2 ( DipAr Am=[(NDip) 2 CAr] - , Dip=2,6-diisopropylphenyl, Ar=4-C 6 H 4 Bu t (Ar') 1 a or Ph 1 b) and two abnormal N-heterocyclic silylenes, ( DipAr Am)SiOCSi{(NDip) 2 CAr} (Ar=Ar' 3 a or Ph 3 b) with N 2 O led to formation of unprecedented examples of uncoordinated silicon analogues of carboxylic acid anhydrides, ( DipAr Am)(O=)SiOSi(=O)( DipAr Am) (Ar=Ar' 2 a or Ph 2 b). Both compounds have been fully characterized, and the mechanism of formation of one explored using DFT calculations. Reduction of sila-acid anhydride 2 a with a dimagnesium(I) compound, [{( Mes Nacnac)Mg} 2 ] ( Mes Nacnac=[(MesNCMe) 2 CH] - , Mes=mesityl), led to the one-electron reduction of the anhydride and formation of a magnesium complex of a sila-acid anhydride radical anion [( Mes Nacnac)Mg{(OSi( DipAr' Am)} 2 O] 5. A combination of EPR spectroscopic studies and DFT calculations reveal the unpaired electron to largely reside on one of the amidinate ligands of the complex.

Titel:	Stabilization and One Electron Reduction of a Silicon Analogue of a Carboxylic Acid Anhydride.
Autor/in / Beteiligte Person:	Jiang, Y ; Yuvaraj, K ; Rajeshkumar, T ; Feng Lim, L ; Cox, N ; Maron, L ; Jones, C
Link:	Full Text Finder (Volltext)
Zeitschrift:	Chemistry (Weinheim an der Bergstrasse, Germany), Jg. 30 (2024-03-12), Heft 15, S. e202303949
Veröffentlichung:	Weinheim, Germany : Wiley-VCH, 2024
Medientyp:	academicJournal
ISSN:	1521-3765 (electronic)
DOI:	10.1002/chem.202303949
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article Language: English [Chemistry] 2024 Mar 12; Vol. 30 (15), pp. e202303949. <i>Date of Electronic Publication: </i>2024 Jan 30. References: . ; N. Tokitoh, R. Okazaki in The Chemistry of Organic Silicon Compounds, Vol. 2, Part 2 (Eds.: Z. Rappoport, Y. Apeloig), Wiley, Chichester, 1998, Chapter 17, pp. 1063-1103;. ; N. Tokitoh, R. Okazaki, Adv. Organomet. Chem. 2001, 47, 121-166;. ; J. Kapp, M. Remko, P. V. R. Schleyer, J. Am. Chem. Soc. 1996, 118, 5745-5751. ; See, for example. ; S. Yao, M. Brym, C. van Wîllen, M. Driess, Angew. Chem. Int. Ed. 2007, 46, 4159-4162;. ; Y. Xiong, S. Yao, M. Driess, J. Am. Chem. Soc. 2009, 131, 7562-7563;. ; T. Fukuda, H. Hashimoto, S. Sakaki, H. Tobita, Angew. Chem. Int. Ed. 2016, 55, 188-192;. ; R. S. Ghadwal, R. Azhakar, H. W. Roesky, K. Prçpper, B. Dittrich, S. Klein, G. Frenking, J. Am. Chem. Soc. 2011, 133, 17552-17555;. ; Y. Xiong, S. Yao, M. Driess, Angew. Chem. 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Grant Information: Australian Research Council; FA2386-21-1-4048 Air Force Office of Scientific Research; Alexander von Humboldt-Stiftung Contributed Indexing: Keywords: 1,2-disilylene; abnormal N-heterocyclic silylene; magnesium (I); radical; sila-acid anhydride Entry Date(s): Date Created: 20231220 Latest Revision: 20240313 Update Code: 20240314

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Stabilization and One Electron Reduction of a Silicon Analogue of a Carboxylic Acid Anhydride.