NMR STUDY OF PHOSPHORUS-CARBON AND PHOSPHORUS-NITROGEN BONDS IN ALKYL-AND MONO-N-SUBSTITUTED AMINOTRIARYLPHOSPHONIUM SALTS
作者: Gurdial Singh
作者单位: 1Pioneering Research Laboratory, Experimental Station, E. I. Du Pont de Nemours & Company, Wilmington, Delaware
刊名: Phosphorus, Sulfur, and Silicon and the Related Elements, 1994, Vol.97 (1-4), pp.125-139
来源数据库: Taylor & Francis Journal
DOI: 10.1080/10426509408020735
关键词: Phosphorus-carbonphosphorus-nitrogenX-rayNMRphosphonium salts
原始语种摘要: 1H, 13C, and 31P NMR spectra of a series of alkyltriarylphosphonium salts, (p-XC6H4)3P+R I- (R = Me, CH2CMe3, and CH2SiMe3; X = H, Me, OMe, and NMe2) are reported. Their chemical shifts and coupling constants, 1JPC and 2JPH, are rationalized in terms of hyperconjugative π bonding between the α C—H bonds and 3d orbitals of phosphorus. NMR including 15N spectra of Ph3P+NHR BF-, where R = H, Me, CMe3, NH2, and NMe2, have also been determined. Relative changes in their parameters are discussed in the light of interaction between the lone pair of nitrogen and d orbitals of phosphorus, and compared vs. those due to hyperconjugative π bonding in the alkyltriarylphosphonium salts. Temperature effects on their spectra are reported and interpreted in terms of changes in bonding around. phosphorus...
全文获取路径: Taylor & Francis  (合作)
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  • NMR N-Modular Redundancy