NDLI: An amidato divalent ytterbium cluster: synthesis and molecular structure, its reactivity to carbodiimides and application in the guanylation reaction

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An amidato divalent ytterbium cluster: synthesis and molecular structure, its reactivity to carbodiimides and application in the guanylation reaction

Content Provider	Royal Society of Chemistry (RSC)
Author	Lu, Chengrong Ding, Hao Yao, Yingming Gong, Chao Zhao, Bei
Copyright Year	2017
Abstract	A divalent ytterbium amidate 1 ([Yb3L6]·2C7H8 for short) was synthesized via amine-elimination of Yb[N(SiMe3)2]2(TMEDA) with an amide proligand N-2,6-diisopropylphenylbenzamide HL (L = 2,6-iPr2C6H3NC(O)Ph) and structurally characterized to be a trinuclear symmetric cluster. Further studies on the reduction of iPrNCNiPr by complex 1 provide Yb(III) complex 2 in hexane–THF ([(YbL2)2(μ-NiPrCNiPr)][YbL3(THF)]·C7H8), which is composed of two subunits in a unit cell, one is a bridged Yb(III) carbene, just the same as complex 4 ([(YbL2)2(μ-NiPrCNiPr)]·3C7H8) obtained in the same reaction in toluene, and the other is a homoleptic monomeric Yb(III) amidate (YbL3). It is also found that complex 2 decomposed to complex 3 ([YbL3]2·2C7H8) and 4 at 90 °C in toluene. Complexes 1–4 were confirmed by X-ray structure determination. Furthermore, complex 4 was proved to be a more active species than its precursor 1 in the catalytic addition of amines to carbodiimides. Finally, complex 1 was found to be an excellent pre-catalyst for the guanylation reaction with a wide scope of substrates.
Starting Page	6031
Ending Page	6038
Page Count	8
File Format	HTM / HTML PDF
ISSN	14779226
Volume Number	46
Issue Number	18
Journal	Dalton Transactions
DOI	10.1039/c7dt00871f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ytterbium Tetramethylethylenediamine Amide Crystal structure Carbene Toluene Homoleptic X-ray crystallography
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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An amidato divalent ytterbium cluster: synthesis and molecular structure, its reactivity to carbodiimides and application in the guanylation reaction

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