Remarkable coordination behavior of alkyl isocyanides toward unsaturated vicinal frustrated P/B Lewis pairs
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
04/06/2014
04/06/2014
01/04/2013
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Resumo |
The conjugated frustrated phosphane/borane Lewis pairs formed by 1,1-carboboration of a substituted diphenylphosphino acetylene, undergo a synergistic 1,1-addition reaction to n-butyl isocyanide with formation of new B-C and P-C bonds to the former isonitrile carbon atom. Using tert-butyl isocyanide dynamic behaviour between the isocyanide-[B] adduct and the 1,1-addition product formation was observed in solution. The different modes of isocyanide binding to the FLPs in the solid state were characterized using X-ray crystal structure analyses and comprehensive 11B and 31P solid-state magicangle- spinning (MAS-) NMR experiments. The free FLP, the Lewis adduct at the borane group, and the cyclic product resulting from isocyanide addition to both reaction centers, can be differentiated via 11B and 31P isotropic chemical shifts, 11B nuclear electric quadrupole coupling constants, isotropic indirect 11B-31P spin-spin coupling constants, and 11B...31P internuclear distances measured by rotational echo double resonance. DFG Fonds der Chemischen Industrie (FCI) NRW Forschungsschule “Molecules and Materials” |
Identificador |
Chemical Science, Cambridge : Royal Society of Chemistry - RSC, v. 4, n. 6, p. 2657-2664, Apr. 2013 2041-6520 http://www.producao.usp.br/handle/BDPI/45275 10.1039/c3sc00082f |
Idioma(s) |
eng |
Publicador |
Royal Society of Chemistry - RSC Cambridge |
Relação |
Chemical Science |
Direitos |
restrictedAccess Copyright The Royal Society of Chemistry |
Palavras-Chave | #REAGENTES #RESSONÂNCIA MAGNÉTICA #SPIN |
Tipo |
article original article publishedVersion |