~(13)C and ~(23)Na Solid-State NMR Spectra of Organosodium Compounds;Part II

摘要

For three organosodium complexes,diphenylmethylsodium (tmeda)(1),diphenyl-methylsodium (pmdta)(2),and fluorenylsodium (tmpda)(3),~(13)C and ~(23)Na solid state NMR spectra have been measured for the first time.They were analysed in terms of chemical shifts delta(~(13)C)and delta(~(23)Na)as well as Na quadrupole coupling constants,X(~(23)Na).Due to non-equivalent ~(23)Na atoms in the unit cell MQS-MAS spectra were used to resolve the individual ~(23)Na resonances.The sensitivity of the NMR parameters for the structural features of the complexes is demonstrated.